Bitcoin is a decentralized cryptocurrency created in 2009 by a person or group of people under the pseudonym Satoshi Nakamoto. It works without a central authority, using a peer-to-peer network to verify transactions and prevent double spending. Transactions are recorded on a public ledger called a blockchain. Bitcoin has been noted for its volatility, its use as a store of value, and its role in the adoption and development of blockchain technology. It is considered the forerunner of the cryptocurrency market and has influenced the creation of many other cryptocurrencies and blockchain applications.

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