Sense It is not possible if this bitcoin becomes the main currency because there are still many countries that have their own currencies and international world currencies are still held by the dollar and the like and most of the countries do not trust bitcoin as a currency because this bitcoin has no real form at all , so it is difficult for people to believe it
If what is meant is money as a means of physical payment, of course the most important thing is the US dollar, because it can be accepted as a means of payment throughout the world. Besides that the US dollar is not too volatile like bitcoin.
But for digital currencies, bitcoin is in a prime position to be used in countries that have legalized cryptocurrency. Bitcoin is the most popular because in addition to being a payment tool, Bitcoin is also traded or a profitable investment in the future.