Banks exchanging cryptocurrencies could be a possibility as the banks in order to still be in the working state and get back that respect they had in the market, they would start exchanging cryptocurrencies so that they are still needed by the people. But that would mean that banks would make fewer profits but then they would come out with schemes that would lead the people to lose their money, like a cryptocurrency loan with mind-boggling interests but in the end just another way of looting us. So it is better that exchanges are done through traders than banks.