When people talk about the benefits of bitcoin over Fiat money, one of the biggest advantages is that bitcoin is more secure and the bank has not control over your money. Generally, people talk about the lack of 3rd party.
Give some examples of the problems with banks you have faced that there wouldn't be if cryptocurrencies existed that time.
the real problem is, banks manage fiat currencies, and bitcoin or crypto are virutal currencies and that are not recognized by banks.
so this is actually the problem for now before banks adopt the blockchain and each country has its own crypto