Since its inception, there have been questions surrounding bitcoin’s ability to scale effectively. Transactions involving the digital currency bitcoin are processed, verified, and stored within a digital ledger known as a . Blockchain is a revolutionary ledger-recording technology. It makes ledgers far more difficult to manipulate because the reality of what has transpired is verified by majority rule, not by an individual actor. Additionally, this network is decentralized; it exists on computers all over the world.How many transactions can the bitcoin network process per second? Seven.2 Transactions can take several minutes or more to process. As the network of bitcoin users has grown, waiting times have become longer because there are more transactions to process without a change in the underlying technology that processes them.
The problem with blockchain technology in the that it’s slow, especially in comparison to banks that deal with . Popular credit card company Visa, Inc. for instance, processes close to 150 million transactions per day, averaging roughly 1,700 transactions per second. The company's capability actually far surpasses that, at 65,000 transaction messages per second.1
How many transactions can the bitcoin network process per second? Seven.2 Transactions can take several minutes or more to process. As the network of bitcoin users has grown, waiting times have become longer because there are more transactions to process without a change in the underlying technology that processes them.
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Ongoing debates around bitcoin’s technology have been concerned with this central problem of scaling and increasing the speed of the transaction verification process. Developers and cryptocurrency miners have come up with two major solutions to this problem. The first involves making the amount of data that needs to be verified in each block smaller, thus creating transactions that are faster and cheaper, while the second requires making the blocks of data bigger, so that more information can be processed at one time. Bitcoin Cash (BCH) developed out of these solutions. Below, we'll take a closer look at how bitcoin and BCH differ from one another. Bitcoin
In July 2017, mining pools and companies representing roughly 80 percent to 90 percent of bitcoin computing power voted to incorporate a technology known as a alled makes the amount of data that needs to be verified in each block smaller by removing signature data from the block of data that needs to be processed in each transaction and having it attached in an extended block. Signature data has been estimated to account for up to 65 percent of data processed in each block, so this is not an insignificant technological shift. Talk of doubling the size of blocks from 1 MB to 2 MB ramped up in 2017 and 2018, and, as of February 2019, the average block size of bitcoin increased to 1.305 MB, surpassing previous records. By January 2020, however, block size has declined back toward 1 MB on average.4
The larger block size helps in terms of improving bitcoin’s scalability
Bitcoin Cash
Bitcoin Cash is a different story. Bitcoin Cash was started by bitcoin miners and developers equally concerned with the future of the cryptocurrency and its ability to scale effectively. However, these individuals had their reservations about the adoption of a segregated witness technology. They felt as though SegWit2x did not address the fundamental problem of scalability in a meaningful way, nor did it follow the roadmap initially outlined by the anonymous party that first proposed the blockchain technology behind cryptocurrency. Furthermore, the process of introducing SegWit2x as the road forward was anything but transparent, and there were concerns that its introduction undermined the decentralization and democratization of the currency.
In August 2017, some miners and developers initiated what is known as a effectively creating a new currency: BCH. BCH has its own blockchain and specifications, including one very important distinction from bitcoin. BCH has implemented an increased block size of 8 MB to accelerate the verification process, with an adjustable level.Bitcoin is a cryptocurrency because the encryption is done using cryptographic methods. Bitcoin is decentralized because cryptocurrencies are not issued and managed by a central entity (such as a central bank) but by the consensus of a large number of users of the Bitcoin network. This requires a consensus mechanism known as proof of work, or PoW for short.
Bitcoin is designed to be deflationary, with a maximum of 21 million BTC coins in circulation. To find enough participants to support the network with computing power (“miners”), they are rewarded with Bitcoin for their computing power.hard fork from the original Bitcoin blockchain. The history of Bitcoin Cash begins in August 2017, when a group of influential Bitcoin miners became dissatisfied with some aspects of the classic Bitcoin (BTC). In particular, the crypto boom at the time caused extremely long transaction times and high transaction costs in the Bitcoin network, which led the miners to decide to permanently separate from the Bitcoin network.
Bitcoin could only process 7 transactions per second, the transaction time is about 10 minutes. To solve this problem there are only 2 possibilities: either the amount of data to be verified per block is reduced — this would make the creation of transactions faster and cheaper. Or one increases the size of the data blocks so that more data can be processed at the same time.
At Bitcoin, the SegWit2x update should be carried out in mid-2017 for this purpose. Almost 80% of all Bitcoin miners and mining pools were in favor of this. However, this contradicted the plan originally presented by Satoshi Nakamoto and there was a lot of confusion about how the development of SegWit2x should continue.
With the hard fork in August 2017, a new cryptocurrency was created: Bitcoin Cash. Bitcoin Cash implemented an increase of the block size — instead of 2MB for Bitcoin — it is 8MB for Bitcoin Cash. Besides, a flexible hash complexity has been built into the Bitcoin Cash protocol so that it can adapt to the number of miners in the network. However, this can reduce the security of the protocol — if the complexity of the encryption is too low.
Because Bitcoin Cash has a block size 4 times larger, the transaction time is 4 times faster. So with Bitcoin Cash, a transaction takes about 2 minutes and 30 seconds. This can also the adoption of the currency because especially merchants want shorter transaction times.Both Bitcoin and Bitcoin Cash are very similar in terms of application areas.
Bitcoin and Bitcoin Cash both claim to be used as a digital currency for the purchase of goods and services and to provide a strong alternative to the use of fiat currencies. This brings them close to the truest meaning of the term “cryptocurrency”. However, the adoption of Bitcoin vs. Bitcoin Cash as an accepted payment method is not yet very widespread. Therefore, a kind of race has broken out to see which payment network can attract the largest or most merchants and outlets to its network.
However, Bitcoin is of course way ahead of its namesake in this respect due to its long existence and market-leading role. Bitcoin fulfills another function above all else — that of value storage, virtually as “digital gold” — crypto-enthusiasts take refuge in Bitcoin in turbulent market times or when share prices are falling to some claims, Bitcoin Cash has not yet really achieved this function, although convinced Bitcoin Cash fans naturally prefer to use Bitcoin Cash wasn’t the first such split from Bitcoin, it was one of the most prominent, as it quickly rose to become one of the top crypto assets by market capitalization (number of the asset in circulation multiplied by the asset’s price).
However, with the names being similar, it can be hard to understand the difference between Bitcoin and Bitcoin Cash from a quick glance.Before Bitcoin became as popular as it is today, it had no problem handling transactions, because there weren’t that many to begin with. Nowadays, with hundreds of thousands of transactions happening daily, transaction speeds can be slower and transaction fees higher. As a result, the network struggles to handle large amounts of traffic while maintaining low fees.This issue of figuring out how to make blockchain technology suitable for mass usage is often referred to as “scalability”.
One of the main ways in which scalability could be achieved is by changing Bitcoin’s blocksize. A new block in a blockchain network contains new transactions that get added to the blockchain periodically.
In the case of BTC and BCH, this is done through the process of “mining”, where miners use their computing power to solve complex mathematical equations.
Miners compete to be the first to solve the equations and win the right to add a new block to the blockchain. In return, they receive a block reward in the form of BTC or BCH for helping to validate new transactions and secure the network.
With BTC’s blocksize at approximately 1 megabyte, there are only so many transactions that can be added to every new block. Periods of high transaction volume can create a long “line” (known as the mempool) of users waiting to get their transaction into a new block.
The only way to deal with this as a user is to wait for your transaction to go through or pay a high transaction fee so that miners prioritize your transaction and include it in a block before others.Discussions about the Bitcoin scalability problem had already been going on for years, and eventually, some members of the Bitcoin community got fed up with the situation. These members of the community became the Bitcoin Cash (BCH) community.
On August 1st, 2017, the BCH team implemented a hard-fork which increased the blocksize from 1 megabyte to 8 megabytes. This resulted in a split Bitcoin blockchain and the birth of the cryptocurrency Bitcoin Cash.
Though this change allows for each block to accommodate more transactions, there is a tradeoff.
Larger blocks also means that less individuals are able to become “nodes”, or computers or servers that store the blockchain and serve it up to other users. This is due to larger blocks taking up more hard drive space, which costs more money for node operators.
This of course can lead to more centralization of nodes, which can undermine the security of the network if a small handful of malicious but powerful actors choose to compromise Bitcoin with their power.
The BTC camp (“small blockers”), therefore, wants to keep blocks small and figure out scalability with “layer 2” or off-blockchain solutions like Lightning Network.
In sum, Bitcoin (BTC) wants small blocks. Bitcoin (BCH) wants big blocks. BTC wants to scale off-chain using layer 2 technologies, while BCH wants to scale on-chain by increasing each block’s size.When it comes to hashrate, or “mining power” of the Bitcoin and Bitcoin Cash networks, BTC is the clear winner.
Bitcoin Cash’s total hashrate, which represents how much computing power miners are using to validate transactions and secure the network, is a fraction of Bitcoin’s. As of writing, BTC’s total hashrate is around 100 exahashes while BCH’s is around 2 exahashes, or a 50x difference.
This means that Bitcoin Cash is more easily susceptible to a “51% attack”, where a malicious actor or group gains 51% or more of the network’ which allows them to do things like reverse transactions or other actions that harm the networkAnother key comparison point to make between Bitcoin and Bitcoin Cash is price. At the end of the day, no one wants to use a crypto asset if it doesn’t have any value.
When it comes to price, it’s hard to beat Bitcoin. For perspective, right before the 2010s, when the world economy went through a major economic recession, traditional financial markets collapsed.
From the market meltdown in March 2009 to December 2019 however, the S&P 500 and the Dow Jones Industrial Average, both major indexes that represent the broader US stock market, have gained 369 and 326 percent respectively. Those types of gains are nothing to laugh at.
Nevertheless, Bitcoin was in its own category and helped the broader crypto asset class become the best-performing asset class of the 2010s.
From March 2010, when 1 BTC was around $0.05, to December 2019, Bitcoin’s price rose more than. That wasn’t a typo! Such gains are unheard of in the world of investing.
Unfortunately, BCH’s performance hasn’t been as strong, since it’s lost about 65 percent of its value since its creation in August 2017.Bitcoin vs. Bitcoin Cash discussions can get very heated, and there are regular debates on the topic, sometimes featuring prominent speakers.
One such debate was a debate between Roger Ver and Tone Vays. Roger Ver is a prominent figure in the cryptocurrency space, as he was one of the first big investors in and evangelists of Bitcoin.
His company, Memory Dealers, was the first established company to accept BTC as payment. He also funded many early Bitcoin startups like Blockchain, Kraken, Bitpay, and Purse.
However, after disagreeing with where the community was going, especially in terms of scalability, Ver turned his focus to BCH.
Vays, on the other hand, is a self-proclaimed “Bitcoin Maximalist” (someone who thinks Bitcoin is superior to other alternatives). Vays has a background in finance, as he worked on Wall Street for Bear Stearns and JP Morgan. Nowadays, he spends time promoting BTC as a means of economic freedom.
Their debate touches on things like transaction speeds, transaction fees, network usage, global adoption, scalability, and decentralization.
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Bitcoin vs. Bitcoin Cash: The Full Comparison
by Daniel WonSemi-trilingual Korean-American guy who feels like knowing about crypto is like when Neo takes the red pill in the Matrix
Dec 27, 2019
in Bitcoin (BTC), Bitcoin Cash (BCH)
On August 1st, 2017, there was a hard fork, or split, in the Bitcoin blockchain. As a result of the fork, two competing cryptocurrencies emerged, Bitcoin (BTC) - the original Bitcoin, and Bitcoin Cash (BCH) - the split from the original Bitcoin.
While Bitcoin Cash wasn’t the first such split from Bitcoin, it was one of the most prominent, as it quickly rose to become one of the top crypto assets by market capitalization (number of the asset in circulation multiplied by the asset’s price).
However, with the names being similar, it can be hard to understand the difference between Bitcoin and Bitcoin Cash from a quick glance.
Here’s the full comparison for Bitcoin vs. bitcoin cash
Bitcoin vs. Bitcoin Cash: Blocksize
Before Bitcoin became as popular as it is today, it had no problem handling transactions, because there weren’t that many to begin with. Nowadays, with hundreds of thousands of transactions happening daily, transaction speeds can be slower and transaction fees higher. As a result, the network struggles to handle large amounts of traffic while maintaining low fees.
Number of Bitcoin Transactions per month. Source: Ladislav Mecirvia Wikipedia
This issue of figuring out how to make blockchain technology suitable for mass usage is often referred to as “scalability”.
One of the main ways in which scalability could be achieved is by changing Bitcoin’s blocksize. A new block in a blockchain network contains new transactions that get added to the blockchain periodically.
In the case of BTC and BCH, this is done through the process of “mining”, where miners use their computing power to solve complex mathematical equations.
Miners compete to be the first to solve the equations and win the right to add a new block to the blockchain. In return, they receive a block reward in the form of BTC or BCH for helping to validate new transactions and secure the network.
With BTC’s blocksize at approximately 1 megabyte, there are only so many transactions that can be added to every new block. Periods of high transaction volume can create a long “line” (known as the mempool) of users waiting to get their transaction into a new block.
The only way to deal with this as a user is to wait for your transaction to go through or pay a high transaction fee so that miners prioritize your transaction and include it in a block before others.
BTC’s average transaction fees shot up to $55 per transaction towards the end of 2017, when many people were using the network. While $55 per transaction is comparable to payment methods like wire transfers, which can also have hefty fees, a $55 transaction fee definitely doesn’t work for something originally envisioned as “peer-to-peer electronic cash” in the Bitcoin whitepaper. Source: Bitinfocharts
Discussions about the Bitcoin scalability problem had already been going on for years, and eventually, some members of the Bitcoin community got fed up with the situation. These members of the community became the Bitcoin Cash (BCH) community.
On August 1st, 2017, the BCH team implemented a hard-fork which increased the blocksize from 1 megabyte to 8 megabytes. This resulted in a split Bitcoin blockchain and the birth of the cryptocurrency Bitcoin Cash.
Though this change allows for each block to accommodate more transactions, there is a tradeoff.
Larger blocks also means that less individuals are able to become “nodes”, or computers or servers that store the blockchain and serve it up to other users. This is due to larger blocks taking up more hard drive space, which costs more money for node operators.
This of course can lead to more centralization of nodes, which can undermine the security of the network if a small handful of malicious but powerful actors choose to compromise Bitcoin with their power.
The BTC camp (“small blockers”), therefore, wants to keep blocks small and figure out scalability with “layer 2” or off-blockchain solutions like Lightning Network.
In sum, Bitcoin (BTC) wants small blocks. Bitcoin (BCH) wants big blocks. BTC wants to scale off-chain using layer 2 technologies, while BCH wants to scale on-chain by increasing each block’s size.
Still in development, Lightning Network is one of the main ways in which the BTC community plans to scale the Bitcoin network. This solution would try to maintain the decentralization of Bitcoin nodes by keeping blocks small and using an off-chain solution like LN to scale Bitcoin. Image credit: Blockstream
Bitcoin vs. Bitcoin Cash: Transaction Fees
As mentioned, one of the main criticisms of BTC as it struggles to meet increasing demand, is high transaction fees. As of now, BCH has lower average transaction fees than BTC ($.0019 for BCH vs. $0.39 for BTC).
However, while the BCH camp might use this point to criticize BTC, it isn’t necessarily a fair comparison (yet), as BCH isn’t used nearly as much as BTC and doesn’t have a large network load.
Bitcoin Cash transaction fees are a fraction of a penny on average. Source: Bitinfocharts
Bitcoin Cash’s daily transactions are a fraction of those of Bitcoin’s. Source: Bitinfocharts
Bitcoin vs. Bitcoin Cash: Transaction Speed
BCH blocks can accommodate more transactions at once, which means transactions are more likely to fit into a block without needing to wait for the next one.
However, it should be noted that BCH is not used nearly as much as BTC and therefore, it has not been tested to the same degree in terms of network traffic.
In any case, BCH is further ahead in its block height when compared to BTC - a clear indicator that BCH is mining blocks and confirming transactions faster.
Bitcoin vs. Bitcoin Cash: Adoption
On the topic of user and merchant adoption, BTC is the clear winner. Though this could change in the future, more merchants, and people in general use BTC.
This of course is probably helped by the fact that BTC is the first cryptocurrency and has been around for more than 10 years, while Bitcoin Cash has only been around since 2017.
Bitcoin daily transactions. Source: Bitinfocharts
Bitcoin’s wider adoption is clearly visible in its large number of daily transactions relative to Bitcoin Cash (number of daily transactions below).
Bitcoin Cash daily transactions. Source: Bitinfocharts
Bitcoin vs. Bitcoin Cash: Hashrate
When it comes to hashrate, or “mining power” of the Bitcoin and Bitcoin Cash networks, BTC is the clear winner.
Bitcoin Cash’s total hashrate, which represents how much computing power miners are using to validate transactions and secure the network, is a fraction of Bitcoin’s. As of writing, BTC’s total hashrate is around 100 exahashes while BCH’s is around 2 exahashes, or a 50x difference.
This means that Bitcoin Cash is more easily susceptible to a “51% attack”, where a malicious actor or group gains 51% or more of the network’s hashrate, which allows them to do things like reverse transactions or other actions that harm the network.
Bitcoin’s tremendous hashrate has contributed to its flawless security track record, as it has never experienced a 51% attack like other networks. Source: Bitinfocharts
Bitcoin vs. Bitcoin Cash: Price
Another key comparison point to make between Bitcoin and Bitcoin Cash is price. At the end of the day, no one wants to use a crypto asset if it doesn’t have any value.
When it comes to price, it’s hard to beat Bitcoin. For perspective, right before the 2010s, when the world economy went through a major economic recession, traditional financial markets collapsed.
From the market meltdown in March 2009 to December 2019 however, the S&P 500 and the Dow Jones Industrial Average, both major indexes that represent the broader US stock market, have gained 369 and 326 percent respectively. Those types of gains are nothing to laugh at.
Nevertheless, Bitcoin was in its own category and helped the broader crypto asset class become the best-performing asset class of the 2010s.
From March 2010, when 1 BTC was around $0.05, to December 2019, Bitcoin’s price rose more than 12 million percent. That wasn’t a typo! Such gains are unheard of in the world of investing.
Unfortunately, BCH’s performance hasn’t been as strong, since it’s lost about 65 percent of its value since its creation in August 2017.
Bitcoin vs. Bitcoin Cash Debate
Bitcoin vs. Bitcoin Cash discussions can get very heated, and there are regular debates on the topic, sometimes featuring prominent speakers.
One such debate was a debate between Roger Ver and Tone Vays. Roger Ver is a prominent figure in the cryptocurrency space, as he was one of the first big investors in and evangelists of Bitcoin.
His company, Memory Dealers, was the first established company to accept BTC as payment. He also funded many early Bitcoin startups like Blockchain, Kraken, Bitpay, and Purse.
However, after disagreeing with where the community was going, especially in terms of scalability, Ver turned his focus to BCH.
Vays, on the other hand, is a self-proclaimed “Bitcoin Maximalist” (someone who thinks Bitcoin is superior to other alternatives). Vays has a background in finance, as he worked on Wall Street for Bear Stearns and JP Morgan. Nowadays, he spends time promoting BTC as a means of economic freedom.
Their debate touches on things like transaction speeds, transaction fees, network usage, global adoption, scalability, and decentralization.
So at the end of the day, which asset is better: Bitcoin or Bitcoin Cash?
For now, BCH has BTC beat on block size, transaction fees and speed. However, BTC undeniably has wider adoption. Also, the Bitcoin network is much more secure due to its high hashrate. Not to mention Bitcoin wins on price as the best-performing asset (across all asset classes, not just crypto) of the decade.
Nevertheless, most of the talking points used to compare the two cryptocurrencies have a lot to do with how long a network has been around.
It’s possible that if BCH becomes more popular, that it will run into the same scalability issues as BTC and suffer from high transaction fees.
It might also be the case that BCH achieves similar or even greater adoption than BTC. Such an increase in popularity could also entice miners to switch over to BCH, if the price of BCH rises in accordance with its increasing popularity.
Thus, for now, a definitive conclusion which is better isn’t set in stone. Yet, for the foreseeable future it’s possible that both Bitcoin and Bitcoin Cash could play important roles, with Bitcoin being more like “digital gold”, or a store of value, and Bitcoin Cash acting as “digital cash”, or a convenient payment method.
Hence, it might not be Bitcoin vs. Bitcoin Cash but Bitcoin and Bitcoin Cash.Both Bitcoin and Bitcoin Cash use the same hash algorithm. In Bitcoin vs. Bitcoin Cash, this is the long-proven SHA-256 algorithm, which was originally developed by the NSA. It is used to sign transaction data and generate a hash value with a fixed size of 256 bits.
However, Bitcoin Cash uses a technology called Emergency Difficulty Adjustment (EDA) to dynamically adapt the complexity of the encryption to the number of available miners in the network. In this way, the calculations along the chain should always continue and a stabilization of the blockchain operation should be guaranteed.Both Bitcoin and Bitcoin Cash are very similar in terms of application areas.
Bitcoin and Bitcoin Cash both claim to be used as a digital currency for the purchase of goods and services and to provide a strong alternative to the use of fiat currencies. This brings them close to the truest meaning of the term “cryptocurrency”. However, the adoption of Bitcoin vs. Bitcoin Cash as an accepted payment method is not yet very widespread. Therefore, a kind of race has broken out to see which payment network can attract the largest or most merchants and outlets to its network.
However, Bitcoin is of course way ahead of its namesake in this respect due to its long existence and market-leading role. Bitcoin fulfills another function above all else — that of value storage, virtually as “digital gold” — crypto-enthusiasts take refuge in Bitcoin in turbulent market times or when share prices are falling to some claims, Bitcoin Cash has not yet really achieved this function, although convinced Bitcoin Cash fans naturally prefer to use BCHrather than BTC as a store of value.While Bitcoin, Bitcoin Cash, and Bitcoin SV have similar-sounding names, there are key differences between these cryptocurrencies. Unfortunately, for those new to crypto, these differences may not be immediately obvious.
In this guide, you will learn about the history and technical specifications of Bitcoin (BTC), Bitcoin Cash (BCH), and Bitcoin SV (BSV) to understand the differences between them.Bitcoin is an open, decentralized, peer-to-peer payment network. This means that it is possible for anyone with an internet connection to join the Bitcoin network and execute financial transactions on it.
Nakamoto designed the network in this manner as it would confer a number of beneficial features to the network. To join the network and participate as a node, one simply needs an internet connection and sufficient memory to download the blockchain.
The fact that anyone can join the network confers it with greater protection in the face of censorship from central authorities, such as governments. Due to the continued robustness of the Bitcoin network over the years, the decentralized, distributed peer-to-peer template has become an accepted standard for creating newer cryptocurrencies, especially if they hope to stand the test of time.
Bitcoin is also the first-ever use case for the blockchain. A blockchain refers to a ledger that is based on sets of data that are linked to each other. Each set of data is linked to the one before it through cryptography. These data sets are called blocks, hence the term blockchain. In the Bitcoin network, each block contains a cryptographic hash of the block before it, a timestamp, and data on the transactions contained in the block.
Distributed networks, such as Bitcoin, face a peculiar problem. They require a tool through which independent parties, in this case, nodes, can come to an agreement over a specific issue. In cryptography, this problem is referred to as the Byzantine Generals problem. A consensus mechanism is thus, how distributed networks achieve finality on a certain issue. To support the creation of a globally accepted state in the ledger, the Bitcoin network leverages a proof-of-work (PoW) consensus mechanism.
Proof-of-work is a consensus mechanism that requires nodes to expend energy to solve complex mathematical equations. Nodes will attempt to find the correct value of a random mathematical problem. Only once they have successfully computed the right value, can they add a new block to the ledger. In the Bitcoin context, nodes that attempt to add new nodes to the ledger.
It is important to note that a number of factors in its design are essential to the immutability of the Bitcoin ledger. To begin with, when a new node joins the network, they must download the entire blockchain. Everyone has access to the agreed-upon and verified version of events. As a result, it is very difficult to roll back the ledger and introduce falsified transactions.
Additionally, there is the fact that PoW large amounts of energy. Therefore, for an attacker or malicious party to edit or falsify the ledger, they must have access to a large amount of energy and money to fund this endeavor. The size and reach of the Bitcoin network make this an almost impossible feat.
In exchange for their work in securing and adding new blocks to the ledger, miners are entitled to a certain number of new bitcoin per block. This number changes at pre-specified intervals (every four years). This is also the mechanism through which new bitcoin are brought into circulation. The maximum number of bitcoin that will ever exist stands at 21 million.
Lastly, the Bitcoin network stands on the principle of voluntary actions. Each node can join and leave the network at will. Similarly, if users are unable to agree on a way forward, they are able to branch off and create their own blockchain. The longest chain represents the agreed-upon version of history. However, if any party at any time wants to branch off and create a new chain, they are free to do so. This is typically called a hard fork.
Bitcoin and Bitcoin cash both are different, several peoples different time use it