Bitcoin is a decentralized cryptocurrency invented by the pseudonymous Satoshi Nakamoto in 2009, using cryptography rather than central authorities to control creation and management, and now primarily serves as a store of value. Its origins trace back to earlier digital cash concepts like Adam Back's hashcash, Wei Dai's b-money, and Nick Szabo's bit gold, which inspired Nakamoto's design. The network launched when Nakamoto mined the genesis block on January 3, 2009, embedding a timestamp referencing The Times headline about a bank bailout, a sly comment on the fragility of fractional-reserve banking. On January 12, 2009, programmer Hal Finney received the world's first Bitcoin transaction, and early adopters included fellow cypherpunks Wei Dai and Nick Szabo. Nakamoto eventually handed the reins to developer Gavin Andresen before vanishing, leaving the creator's identity an enduring enigma. Since the mid-2010s, Bitcoin has grown into a significant financial asset, with some businesses accepting it alongside traditional currencies.