Bitcoin is a consensus network that enables a new payment system and completely digital currency. It is the first decentralized peer-to-peer payment network that is powered by its users with no central authority or middlemen. From a user perspective, Bitcoin can be considered to be cash for the Internet. Bitcoin can also be seen as the most prominent triple entry book keep in system in existence. While there are or have been at least 110 other digital currencies, Bitcoin accounts for 77% of the market value of all digital currencies and an even higher percentage of digital currency users.