$BTC Bitcoin (BTC) is the world's first and most well-known cryptocurrency, launched in 2009 by the pseudonymous Satoshi Nakamoto. It operates on a decentralized blockchain network, allowing peer-to-peer transactions without intermediaries like banks. Bitcoin is limited to 21 million coins, making it scarce and often seen as digital gold. Its price is highly volatile, influenced by market demand, investor sentiment, regulation, and macroeconomic factors. Bitcoin is used as both a store of value and a medium of exchange, with growing acceptance worldwide. Despite criticism over energy use and scalability, it remains a key player in the crypto ecosystem.