Btc will be good store value and usdt will be good stable currency and gold crypto will be good coin to grow your money by the time.
As we know euro currency will follow to russian ruble soon as there is nothing what backing euro it will fall also no neeed to mention but some country property prices go down atleast 70%
Its a great financial reset and times like this you use crypto to hedge yourself.
But nothing is relqted to mortgages in what you said here.
Mortgage during a period of a long term war isn't the best choice anyways. So in order to save your holdings, it's better to hold gold and few digital assests like bitcoin or Ethereum (not USDT). All the other traditional currencies are corelated and if one of them will fall then wait for others to follow it in a Domino effect .