Bitcoin | $BTC $BTC is a decentralized digital currency that was created in 2009 by an unknown person or group of people using the pseudonym Satoshi Nakamoto. It operates on a technology called blockchain, which is a distributed ledger that records all transactions across a network of computers. Bitcoin transactions are verified by network nodes through cryptography and recorded on the blockchain. One of the key features of Bitcoin is its limited supply, with only 21 million coins ever to be mined. This scarcity has led to Bitcoin being viewed as a store of value, similar to gold.