Bitcoin (BTC) is known as the first open-source, peer-to-peer, digital crypto currency that was developed and released by a group of unknown independent programmers named Satoshi Nakamoto in 2008. Crypto coin doesn’t have any centralized server used for its issuing, transactions and storing, as it uses a distributed network public database technology named block chain, which requires an electronic signature and is supported by a proof-of-work protocol to provide the security and legitimacy of money transactions. The issuing of Bit coin is done by users with mining capabilities and is limited to 21 million coins. Currently, Bitcoin’s market cap surpasses $138 billion and this is the most popular kind of digital currency. Buying and selling crypto currency is available through special Bitcoin exchange platforms or ATMs.