Bitcoin is a decentralized digital currency created in 2009 by the pseudonymous Satoshi Nakamoto. It enables peer-to-peer transactions without relying on banks or central authorities.

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🔹 Key Features

Decentralized ledger (blockchain): All transactions are recorded in a chain of blocks, verified by many nodes across the network rather than one central party.

Fixed supply: The protocol limits the total number of bitcoins to ~21 million.

Proof of Work mining: Miners solve cryptographic puzzles to add new blocks, earning rewards, and securing the network.

Peer-to-peer transfers: It allows value to be sent from one person to another globally, often without intermediaries.