Bitcoin is the first implementation of a concept called "cryptocurrency", which was first described in 1998 by Wei Dai on the cypherpunks mailing list, suggesting the idea of a new form of money that uses cryptography to control its creation and transactions, rather than a central authority. The first Bitcoin specification and proof of concept was published in 2009 in a cryptography mailing list by Satoshi Nakamoto. Satoshi left the project in late 2010 without revealing much about himself. The community has since grown exponentially with many developers working on Bitcoin.
Satoshi can be any one. Even me or you. He might be having a watch over the whole fraternity with millions of bitcoins in his pocket and just laughing around. Or this might all be just a trap by the central governments. Their are a whole lot of conspiracy theories which clearly depict that bitcoin might be just another trap set by the governments. Some say it initiated to act as a shield against government's policies.