I personally use both, I'm saving bitcoin to sell at highest price, and I'm saving fiat currency into the bank to buy bitcoin at a lower price.
That's why I believe that both have important roles in different situations.
of course, I agree with you. both have advantages and disadvantages of each. by keeping both of us can have a better future as well.
because both are also needed, required under the conditions that we experience.
you are right, of course both banks and bitcoin wallets are needed though in my opinion in the future we might not even need any banks