$BTC Bitcoin, the first and most well-known cryptocurrency, is a decentralized digital currency. It operates on a peer-to-peer network called the blockchain, a public ledger that records all transactions.

Unlike traditional currencies issued by central banks, Bitcoin's supply is limited to 21 million coins, adding to its scarcity appeal. It's used for online payments, investments, and as a store of value.

Bitcoin's price is volatile, influenced by factors like market sentiment, regulation, and technological developments. Despite its price fluctuations, Bitcoin remains a dominant force in the crypto world, paving the way for thousands of other digital currencies.