What happens to VOO/VTI future returns if USD loses global reserve status?

I hold both of these ETFs through RRSP and TFSA along with some XEQT.

If the dollar was to fail, what the the S&P 500 and US Total Stock Market look like 5-10 years afterwards? Would they fail completely? Would the gains be about half of what they are now?

Sorry if the answer is obvious but I'm curious about this, because one day I knight need to change my plan of attack in terms of investing.

Thanks!