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.
Yes I guess it is, cause I think one kf tge factor why Bitcoin decreases, becaus eof the demand outaide the certain country, foreign countries to be exact and we are all aware that the convertion of the monetary unit is very different with each other, also people who were less fortunate may be able to afford the goods, if we have single currency of fiat to be used since the price will be the same in what you have.