Bitcoin that is not affiliated with a country, in my opinion, is very likely to be used as a world currency for trading. Without any affiliation, the influence of a country's situation to the value of Bitcoin will be very minimal, so Bitcoin will be more stable in exchange rates.
Yes, I agree with you. Because world trade that uses the majority of USD makes USD very valuable and gives benefits to the United States, at least in the form of influence to other countries. But, the dependence of world trade on USD is not yet ideal. Because USD is the currency of a country, where if something happens with that country automatically the value of the currency will be affected.