If the world uses a single currency, will the economy be more stable?
This is a very interesting question. The sovereign nations issue their own currencies and are taken for granted by many people, but few consider whether this is the economically optimal option.
I think that would be a total mess. Well those countries that will benefit will only be the rich countries. And there won't be anymore currency trading. For example you have a business and you want to go global because the monetary value of the other countries are higher so you thought that you can benifit something from it. But it would if we had only a one currency you can't have any profit anymore. So I think it's not really a good idea having a single currency. And beside from that each country has a central bank where they decide the value of the currency of their country so that they can regulate the economic state of a country. So if the third world countries has the same monetary value of the rich countries I think the third world countries will only get poorer.