If all the currencies in the world become same now, in my opinion, it has good and bad effects for different countries for example some countries’ money currencies value will increase but the other may not so in this situation i think there will be protests in the countries that the value of the normal currency decreased but One of the primary advantages of a universal currency lies in its potential to streamline international transactions. The elimination of currency exchange would simplify trade and financial transactions, reducing associated costs and fostering economic efficiency.SO i think: Businesses and individuals would benefit from a more straightforward global financial landscape. However, if the currency changes the investors in all around the world will lose money so i think it will lead to protests around the world like the first example i give and if all the currencies become same the quality of life will decrease in many countries, for example:
if all currency become USD and after this when an american comes to a poorer country the people living in the poorer country become more poorer and the people living in the richer countries will get richer and the richer countries will start to lose people because the peoples are want to get richer. The second example is:if all the furniture,food,technological devices etc.become same price in every country the the population problem will be solved in the richer countries but the people that are living in the poorer countries will start to die because they cant afford food etc.
these are the some bad and good effects for me.