There is but it would be a lot of methods that they have to add at the same time. But bitcoin as their choice, some of them really are having interest on it but we can't be sure if many of them will.
For sure banks have a lot of procedures for that and when banks will invest in bitcoin, I think they will think to their customers if one day their customers withdraw money at any time in case of inflation. especially if bank customers with large money holders, the bank may choose low risk rather than losing their good name.