$BTC Bitcoin (BTC) is the first and most well-known cryptocurrency, created in 2009 by an anonymous person or group known as Satoshi Nakamoto. It operates on a decentralized blockchain network, allowing peer-to-peer transactions without the need for banks. Bitcoin uses proof-of-work to validate transactions and secure the network. Its supply is limited to 21 million coins, making it scarce and often referred to as "digital gold." Bitcoin is widely used for investment, remittances, and as a hedge against inflation. Despite volatility, it remains the largest crypto by market cap and plays a central role in the entire crypto ecosystem.