Bitcoin is useful as a money that has long-lasting, concise, exchangeable, rare, shareable, and recognizable properties. Bitcoin is supported on the basis of mathematical formulation rather than based on physical form (such as gold and silver) or confidence in the center (such as fiat currency). What is Bitcoin money or currency? this condition can be measured by the growth of users, sellers and early users. Like any other currency, bitcoin comes only from people who want to accept it as a means of payment.