$BTC Bitcoin (BTC) is a decentralized digital currency, created in 2009 by an unknown person using the alias Satoshi Nakamoto. It operates on a peer-to-peer network without a central authority or banks. Transactions are verified by network nodes through cryptography and 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 can be used for online purchases, investment, or as a store of value. Bitcoin's price is highly volatile, influenced by demand, market sentiment, regulation, and adoption. It remains the most recognized cryptocurrency worldwide.