you want to export to the usa then you accept their dollar payments. they are almost all countries biggest customer . what currency is going to be used and who will administer that currency which is free float and not manipulated like china yuan
Every nations currency will be used, not to give value by only one currency . Because every currency will be used backing it by gold and resources and trade. So inflation can be controlled as it should have been, not by one nation imposing tariffs and economic sactions and controlling the market . When even if you had resources, your nation is still broke because of sactions against your nation. Just look at Venezuela they are poor because of sactions. That's why all these BRICS.