$BTC Bitcoin (BTC) is a decentralized cryptocurrency created in 2009 by a person or group under the pseudonym Satoshi Nakamoto. It operates without the need for central banks, using blockchain technology to securely and transparently record transactions. Users can send and receive BTC globally with reduced fees and without intermediaries. Its supply is limited to 21 million coins, making it scarce and attractive as a store of value. Bitcoin has been criticized for its volatility and potential use in illegal activities, but it has also been praised for its technological innovation and its role in financial freedom.