If your debts are also denominated in USD, their value will be fixed relative to your cash assets. This assumes a fixed rate, of course, but a 30 year fixed is common in the US and makes up a substantial portion of most folks’ debt.

I have a big chunk in FXE (like owning Euros) precisely for this reason.

What specific thing(s) are you worried that USD will take a dive relative to?

Then once you have an answer to that question, that might point you towards what you want to be long.