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 so. One currency can make our money stable.
In other case, using one strong currency with different country development maybe will be problem for some country which has low development.
That is what I am thinking as well when I was in College why would this world just unite to have a single currency? So that it won't make any confusion at all, especially when travelling abroad. Well, as much as we want to for sure all countries would not agree with this kind of agreement as they want to print their respective local tender on their own.
For if a country uses the currencies of other countries, its economy will not be under their control, and in this case, it will be controlled by other countries in the form of money to control its own resources. For them, This is very bad.