Whether or not the electronic money through the future is easy is a difficult question. Firstly, in terms of economic integration, this is very difficult now because each country has its own face value and money, it is difficult to synchronize, another difficulty is that the legal is unclear because each country has one private law. Secondly, the political, military, and information technology are uneven, leading to access to electronic money is not virtual reality. So how to solve this problem?
First, every country can issue its national Cryptocurrency to circulate and not need to move with other countries because you can exchange it through exchanges. Second, crypto cannot destroy or create even when World War 3 takes place. Exchange and buy-sell activities will easily happen also if the worst happens. It can solve current problems, but it needs approval from countries.