Bitcoin is a digital currency that is based on a distributed ledger called the blockchain. It was created in 2009 by an unknown individual or group of people using the fake name Satoshi Nakamoto. Unlike traditional fiat types of money, which are issued and controlled by governments, Bitcoin is not tied to any particular country or central bank. Instead, it is supported by a network of computers around the world that work together to process and (check for truth/prove true) transactions using complex mathematical sets of computer instructions. Bitcoin can be used to buy and sell products and services online, and can also be traded.