It's more about the dollar losing its status of default global currency in the long run, with more and more emerging countries growing increasingly defiant and worried about these questions and with the sanctions pushing Russia away from US/EU banks/tech/services it's natural that they'll start thinking more seriously about building alternatives on their side.

I don't care about foreign investors, I don't care much about the US either, but if the dollar continues to lose relevance (albeit very slowly, but increasingly faster) you have to wonder what will the far future bring.

It's more of a though experiment than anything for me, I'm just curious about how all of this will end in 50-100 years

Which of these emergent countries' investors are switching away from the dollar? Governments and transactions, sure, but as long as God's greenbacks are the dominant transactional currency for investments, I don't see any adverse issues with it. Chinese, Arab, Indian and Russian investors all prefer the dollar for external investments, or the Swiss franc in niche cases. The investor classes don't really give a damn about what their respective governments vacillate about jingoistically.