In 2 to 3 years time another crisis will come and at that time the crypto currency will flourish again with new all time high prices.
I think if fiat currencies will fall in value due to the upcoming crisis you predict, then high prices for crypto will be unavoidable, but that's not what we expect from crypto in general. What we expect is that the price of the most established coins in USD will rise while the purchasing power of USD will remain the same. Only this process we can call
rising in the real sense of the word. Otherwise it will be just monetary depreciation of fiat currencies.
Things are quite unpredictable as no one is sure about what will happen in the future and that things have become more interesting because of the crypto currencies as now people have one more choice. To save yourself from any kind of financial crisis, the best thing which can help you is to go for saving some money by investing the money at the right place and that you need to prepare yourself for the worst.