The popularity and market value of virtual currencies such as Bitcoin, Ethereum, Litecoin ... are getting stronger and stronger, showing the welcome of investors, users and even governments. But in the near future, virtual currency is facing many difficulties. Despite the limitations and suspicions of its existence, virtual currency is still showing momentum as the value and acceptance increase day by day. Is it really the "money of the future"? It is difficult to answer this question, but virtual currency may indeed be the global currency of the present.