In a financial crisis , the banks will restrict access to you savings acct
But you will be able to use your crypto wallets.

Yes , both would have liquidity problem in the short term. But when banks do open, people will close thier savings accts and buy bitcoins.

Bitcoins and other crytocurrencies will rise but the banks will not

You will see this when Venezuela and Greece are able to stabilize their economies. People will never put their savings in banks again

This is why Americans are so interested in cryptocurrencies. Because it happened to them in 2007-2008 when the banks screwed them over