Bitcoin is a currency like Dollar, Pound Sterling and others. However, Bitcoin is digital and has very strong data encryption. In addition, Bitcoin is the first currency that can not be in control of its value by Institutions, Companies, governments, even the creator of the currency though. Bitcoin design is a Peer-to-Peer transaction technology where transactions do not require third parties who always take advantage. Crypto currency is also decentralized, meaning that it is not centered on a single administrator so that all transaction records in blockchain ledger (Ledger Blockchain) can be managed by all Bitcoin users in the world.