BTC.
Bitcoin (₿) is a decentralized digital currency, without a central bank or single administrator, that can be sent from user to user on the peer-to-peer bitcoin network without the need for intermediaries.[7] Transactions are verified by network nodes through cryptography and recorded in a public distributed ledger called a blockchain. The cryptocurrency was invented in 2008 by an unknown person or group of people using the name Satoshi Nakamoto.[9] The currency began use in 2009[10] when its implementation was released as open-source software.[6]: ch. 1
BitcoinDenominationsPluralbitcoinsSymbol₿ (Unicode: U+20BF ₿ BITCOIN SIGN (HTML ₿))[a]CodeBTC, XBT[b]Precision10−8Subunits 1⁄1000millibitcoin 1⁄100000000satoshi[2]DevelopmentOriginal author(s)Satoshi NakamotoWhite paper"Bitcoin: A Peer-to-Peer Electronic Cash System"[4]Implementation(s)Bitcoin CoreInitial release0.1.0 / 9 January 2009 (12 years ago)Latest release22.0 / 13 September 2021 (3 days ago)[3]Code repositorygithub.com/bitcoin/bitcoinDevelopment statusActiveWebsitebitcoin.orgLedgerLedger start3 January 2009 (12 years ago)Timestamping schemeProof-of-work (partial hash inversion)Hash functionSHA-256 (two rounds)Issuance scheduleDecentralized (block reward)
Initially ₿50 per block, halved every 210,000 blocks[7]Block reward₿6.25[c]Block time10 minutesCirculating supply₿18,660,000 (as of 20 March 2021)Supply limit₿21,000,000[5][d]DemographicsOfficial user(s) El Salvador[8]
^ The symbol was encoded in Unicode version 10.0 at position U+20BF ₿ BITCOIN SIGN in the Currency Symbols block in June 2017.[1]
^ Compatible with ISO 4217.
^ May 2020 to approximately 2024, halved approximately every four years
^ The supply will approach, but never reach, ₿21 million. Issuance will permanently halt c. 2140 at ₿20,999,999.9769.[6]: ch. 8
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Bitcoins are created as a reward for a process known as mining. They can be exchanged for other currencies, products, and services,[11] but the real-world value of the coins is extremely volatile.[12] Research produced by the University of Cambridge estimated that in 2017, there were 2.9 to 5.8 million unique users using a cryptocurrency wallet, most of them using bitcoin.[13]
Bitcoin has been criticized for its use in illegal transactions, the large amount of electricity (and thus carbon footprint) used by mining, price volatility, and thefts from exchanges. Some economists and commentators have characterized it as a speculative bubble at various times. Bitcoin has also been used as an investment, although several regulatory agencies have issued investor alerts about bitcoin.[12][14][15]
The word bitcoin was defined in a white paper published on 31 October 2008.[4][16] It is a compound of the words bit and coin.[17] No uniform convention for bitcoin capitalization exists; some sources use Bitcoin, capitalized, to refer to the technology and network and bitcoin, lowercase, for the unit of account.[18] The Wall Street Journal,[19] The Chronicle of Higher Education,[20] and the Oxford English Dictionary[17] advocate the use of lowercase bitcoin in all cases.
What is BTC and how does it work.
When the richest person in the world gives his support to a virtual currency you know it's big business.
Elon Musk has told users of an online social media app that he thinks the virtual currency, Bitcoin, is a "good thing."
His comments resulted in the value of Bitcoin rising significantly.
So much so, that a singular Bitcoin went from being worth £3,600 in March last year to more than £27,000 now.
As talk of the currency has gone global, the Bank of Singapore has suggested that the 12-year-old currency could replace gold as its store of value.
However, in October, the head of the Bank of England, Andrew Bailey, warned about the unpredictability of Bitcoin, saying it makes him, "very nervous".
With all this talk you're probably wondering - what is Bitcoin and how does it all work?
Here's everything you need to know.
What is Bitcoin?
Bitcoin, often described as a cryptocurrency, a virtual currency or a digital currency - is a type of money that is completely virtual.
It's like an online version of cash. You can use it to buy products and services, but not many shops accept Bitcoin yet and some countries have banned it altogether.
However, some companies are beginning to buy into its growing influence.
In October last year, for example, the online payment service, PayPal, announced that it would be allowing its customers to buy and sell Bitcoin.
The physical Bitcoins you see in photos are a novelty. They would be worthless without the private codes printed inside them.
How does Bitcoin work?
IMAGE SOURCE,GETTY IMAGES
Image caption,
A Bitcoin wallet app on a smartphone
Each Bitcoin is basically a computer file which is stored in a 'digital wallet' app on a smartphone or computer.
People can send Bitcoins (or part of one) to your digital wallet, and you can send Bitcoins to other people.
Every single transaction is recorded in a public list called the blockchain.
This makes it possible to trace the history of Bitcoins to stop people from spending coins they do not own, making copies or undo-ing transactions.
How do people get Bitcoins?
IMAGE SOURCE,DENES FARKAS
There are three main ways people get Bitcoins.
You can buy Bitcoins using 'real' money.
You can sell things and let people pay you with Bitcoins.
Or they can be created using a computer.
How are new Bitcoins created?
IMAGE SOURCE,REUTERS
Image caption,
People build special computers to generate Bitcoins
In order for the Bitcoin system to work, people can make their computer process transactions for everybody.
The computers are made to work out incredibly difficult sums. Occasionally they are rewarded with a Bitcoin for the owner to keep.
People set up powerful computers just to try and get Bitcoins. This is called mining.
But the sums are becoming more and more difficult to stop too many Bitcoins being generated.
If you started mining now it could be years before you got a single Bitcoin.
You could end up spending more money on electricity for your computer than the Bitcoin would be worth.
Why are Bitcoins valuable?
IMAGE SOURCE,REUTERS
Image caption,
Bitcoins are valuable simply because people believe they are
There are lots of things other than money which we consider valuable like gold and diamonds. The Aztecs used cocoa beans as money!
Bitcoins are valuable because people are willing to exchange them for real goods and services, and even cash.
Why do people want Bitcoins?
Some people like the fact that Bitcoin is not controlled by the government or banks.
People can also spend their Bitcoins fairly anonymously. Although all transactions are recorded, nobody would know which 'account number' was yours unless you told them.
In an online chat with social media users in January 2021, the world's richest man, Elon Musk, said he was a big supporter of Bitcoin.
He even went as far as to change his Twitter bio to "#bitcoin".
He has repeatedly shown his support to online currencies in recent years and caused major movements in their values due to his own personal wealth and influence.
This particular endorsement led to the value of Bitcoin to rise significantly.
Is it secure?
IMAGE SOURCE,GETTY IMAGES
Every transaction is recorded publicly so it's very difficult to copy Bitcoins, make fake ones or spend ones you don't own.
It is possible to lose your Bitcoin wallet or delete your Bitcoins and lose them forever. There have also been thefts from websites that let you store your Bitcoins remotely.
The value of Bitcoins has gone up and down over the years since it was created in 2009 and some people don't think it's safe to turn your 'real' money into Bitcoins.
This concern was expressed by the head of The Bank of England, Andrew Bailey, in October 2020.
He said that he was "very nervous" about people using Bitcoin for payments pointing out that investors should realise its price is extremely volatile.
By this, he meant that the value could drop significantly at any moment and investors could lose a lot of money.
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