Bitcoin is a decentralized digital currency that operates without the need for a key authority or intermediary, like a bank. Introduced in 2009 by an unrevealed individual or group subservient to the pseudonym Satoshi Nakamoto, Bitcoin is powered away blockchain technology, a public ledger that records all transactions securely and transparently. It is known an eye to its narrow reservoir of 21 million coins and its say as a collect of value and mean of exchange. Bitcoin has become a well-received investment alternative and a symbol of the evolving digital economy.