The reunification of the currency is certainly good, but this is hard to come by because it means that all countries on earth have an alliance or just one country left, just like the EU. The former approach is basically impossible because countries have different views Different habits, and then one, for the time being, every nation has such abilities.
and this will only favor the smallest country,because in this case all country will stand as one,and will treat as one.and this is impossible to passed by the biggest countries in the world.like EU,USA, and many other countries that has good economy.