$BTC Bitcoin (BTC) is a decentralized digital currency created in 2009 by an unknown person or group using the name Satoshi Nakamoto. It operates on a peer-to-peer network, allowing users to send and receive payments without a central authority. Transactions are recorded on a public ledger called the blockchain, which ensures transparency and security. Bitcoin is limited to 21 million coins, making it scarce and often compared to digital gold. It is widely used for investment, trading, and as a hedge against inflation. Despite its volatility, Bitcoin remains the most popular and valuable cryptocurrency in the world today.