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.
The economy will have to be stable and in sync if it is going to use a single currency, and if it becomes a reality by then then each economy across the globe will act as one and change as one as the market circulates but it will be quite a feat in order to break the walls of each nation's differences when it comes to its economy.