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.
Every nation use only money as the currency. But there are different currencies for every different countries. There are US dollars, European euros, Australian dollars, British pounds, Philippine peso. If you're in the Philippines you must have Philippine peso but that Philippine peso has no value when it comes to US, Australia, Britain, and Europe. You must change or convert it to the currency of the country you are going to. If it happen that there is only one currency for all different countries like bitcoin, that's great. Anywhere you go you can use your bitcoin and you will not convert or change it. Maybe the country that has not so progressive economy will have a hard time to cope up with countries that have a very progressive
economy like Philippines and US.