Bitcoin is a decentralized digital currency, created in 2009 by an unknown person or group using the pseudonym Satoshi Nakamoto. It operates on a technology called blockchain, a distributed ledger enforced by a network of computers, known as nodes. Bitcoin transactions are recorded on the blockchain, making them secure and transparent. The supply of Bitcoin is capped at 21 million coins, fostering scarcity. It is often used for peer-to-peer transactions and considered a store of value. However, its value can be volatile, and regulatory developments impact its adoption.