Bitcoin has value because it is as valuable as money. Bitcoin has the properties of money (durable, concise, exchangeable, rare, divisible, and recognizable) based on mathematical formulas rather than based on physical form (such as gold and silver) or confidence in the center (such as fiat currency). In short, Bitcoin is supported by math. With these attributes, all that is required of money to have an exchange rate is trust and acceptance. In the case of Bitcoin, this condition can be measured by the growth of users, sellers and early users. Like other currencies, the value of bitcoin comes only from people who are willing to accept it as a means of payment.