Countries like the United States, China and South Korea are countries that invest a lot of money in bitcoin in 2017. The United States and China have their own rules governing bitcoin trading, one of which is that bitcoin in China can only be traded by ordinary people. Government employees and bank employees and bitcoin business leaders in China. Whereas in Japan and South Korea's bitcoin trading rules have not been clearly resolved. Japan has just revised the rules that allow the use of bitcoin as a payment instrument, but has not clearly regulated the trade.