Without the internet, you are right, crypto is completely useless. I think you should be ready for every possible scenario. I know many people here hate FIAT but a $100 bill in your pocket might save your life if you were living in Ukraine or Russia.
Even debit and credit cards are useless without the internet, since they all require online verification to work, and it's almost impossible to to buy anything. Depending on the type of the crisis, there have been numerous cases throughout history when certain fiat currencies have also been useless.