the dollar is fighting back so it's not really going to disappear but it will exist like all major currencies.
as an individual, although we are seeing news about dedollarization, it may still be good for you as a person to use the dollar especially because its value is still strong compared to your local currency. which means the benefit of using it is way advantageous for people in the 3rd world counties. you could care less about geopolitics still when it comes to money.
Look at the major fiat currencies apart from USD. We have British Pound, Euro, Japanese Yen, Chinese Yuan, Russian Ruble, Indian Rupee and Korean Won. None of these currencies have a reputation that is better than the US Dollar. There are a few currencies that can be considered as stronger than the USD, such as Swiss Franc and Singapore Dollar. But they don't have much liquidity and can't be used in a large scale for international trade. So I would say that at least for the next 20-30 years, US Dollar will remain as the currency of global trade.