$BTC Bitcoin (BTC) is the first and most well-known cryptocurrency, created in 2009 by an anonymous individual or group using the name Satoshi Nakamoto. It operates on a decentralized, peer-to-peer network using blockchain technology, which ensures transparent and secure transactions without the need for a central authority like a bank. Often seen as "digital gold," Bitcoin is both a store of value and a medium of exchange, and its limited supply of 21 million coins contributes to its scarcity and appeal among investors and technology enthusiasts.