"Nobody says you need to ONLY invest using US $"

I know nothing about foreign currency. I do own non-USA ETF's.

My 1st instinct is that stock returns will be better than fixed income even taking into account that another 2007/2008 drop in market value occurs. It is pretty mindblowing to me the number of self-inflicted
headwinds that are forming against economies world wide, not just USA (and the USA is responsible for a lot of these headwinds).
And there is a non zero chance that America becomes a pariah to the rest of the World. At the very least, we are showing ourselves to be a very,very unreliable trading partner.

My port has about 10 years of short term fixed income instruments, so do have some ballast. But if a loaf of bread and a gallon of gas go to $20 each, then there is probably no place to hide.