Although Japan has accepted bitcoin, we can not be sure that the whole world will accept bitcoin. It is possible that bitcoin is becoming popular and well known, but, in essence, it is still a virtual currency, its value depends entirely on real money. It never changes. Virtual money is a constant change, even though it has existed for a long time, but it always has big and irreparable problems. It could be the reason that banks around the world accept bitcoin. The future is something that we can not be sure of.