Banks are earning big profit from our deposits, they earn bigger than the interest that we get from our deposit because they put a bigger interest rate through thier borrower's or lenders, i think bank is not too far from big whales in crypto they buy or collect coins in dip and they sell in bull and they earn bigger from the holders that sell at loss they are almost the same or what? What dou you think?
The main difference is that banks are controlled by government while whales are private individuals like you and me. In some countries, banks deposits are insured as well till certain amount.