$ETH Bitcoin (BTC) is a decentralized digital currency that enables peer-to-peer transactions without intermediaries. Created in 2009 by an anonymous entity known as Satoshi Nakamoto, Bitcoin operates on a blockchain, a public ledger that records all transactions. Bitcoin's decentralized nature and limited supply (21 million) have attracted investors and users worldwide. It's often seen as a store of value and a hedge against inflation. Bitcoin's price can be volatile, and its use cases extend beyond payments to include smart contracts and decentralized finance (DeFi) applications. Its impact on traditional finance and technology continues to evolve.