Its really good to know that banks are now getting to know the potentials of crypto that they've decided to venture into it. Though bank investment is the safest but you can compare the profit in bank investment to crypto investment.
Banks have two types of investments that is depositing and investing,so both have different risk level.All the people think that depositing their money into the bank account is safe but it actually the most useless depositing because the long time investment as fiat money will kill its value because of inflation and also many governments have such policy that they an take the users's balance if they made serious loss in their stocks so know your bank's policy before saying that is safest.When comparing with that the crypto investment is much profitable with the considerable amount of risk level.