[Edited to make it more understandable question]
What if all nation use only a one currency or one global currency?, What will happen to our world?, What is the effect of every nation's or every country economy?, It can make people's unite each other?Any opinion.
First thing bound to happen is: whoever controlling (printer, mint) this global currency will rule the world. If in case currency is readily available to everyone and decentralized then With global currency in place a dominance of one nation will end. Overseas job drain will be stopped immediately. There will be end of forex. It would be interesting to see how currency is being managed in these kind of scenario. Depending on that factor everything will shape up.What if all nation use only a one currency or one global currency?, What will happen to our world?, What is the effect of every nation's or every country economy?, It can make people's unite each other?Any opinion.