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Bitcoin (BTC) is a cryptocurrency that runs on a decentralized network and, unlike traditional currencies, requires no intermediaries like banks or financial institutions. Instead, the Bitcoin network relies on computer nodes and miners distributed around the world that help process, verify and record transactions on an immutable ledger called the blockchain. A blockchain, as the name suggests, is made up of blocks of transactions grouped together by proof-of-work miners on the Bitcoin network. This entire process, as well as Bitcoin's self-regulating issuance and consensus mechanisms, are all coded into the protocol designed by its anonymous creator, Satoshi Nakamoto. Today, Bitcoin is the leading digital currency both in terms of popularity and market capitalization, and users can buy or sell Bitcoin safely on a secure cryptocurrency exchange like OKEx.