$BTC Bitcoin (BTC) is the first and most well-known cryptocurrency, created in 2009 by the pseudonymous Satoshi Nakamoto. It operates on a decentralized blockchain network, enabling peer-to-peer transactions without intermediaries. Often called "digital gold," BTC is limited to 21 million coins, driving its scarcity. It plays a central role in the crypto market and is widely used as a store of value, hedge against inflation, and a foundation for decentralized finance.