$BTC Bitcoin (BTC) is a decentralized digital currency created in 2009 by an anonymous person or group using the name Satoshi Nakamoto. It operates without a central authority like a bank or government. Transactions are recorded on a public ledger called the blockchain. Bitcoin is limited to 21 million coins, making it scarce and often compared to digital gold. It’s used as a store of value, a hedge against inflation, and a payment method in some places. Despite volatility, Bitcoin has gained global attention and adoption. Investors view it as both a risky asset and a revolutionary financial technology.