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.
It was created by satoshi nakamoto in 2009.But know one knows that where he is, it is a biggest mistery in cryptoworld. The main intention of created the Bitcoin is to minimize the usage of paper money. These cryptocurrencies are decentralized and digital money which can be used to make easy transactions where your identity is not known by the government and controlled by them. On the other hand its a part time earning where it is used to fulfil the need of many people.