It is not easy to take place of banks by crypto because it's not easy to handle anybody. Obviously crypto reached the place of payment mode in some category.
On the other hand, It's not possible to avoid banks in everyday people's life. A bank is the most trusted media by people's practical world. So everyone can't want of bank's death very early the mentioned topics. So stay with the bank for your safe life & livelihood.
Banks are part of the state system of government and therefore is under the strict protection of states. For them, a threat to their existence will arise only when the states themselves are destroyed as a way of social order. But humanity does not yet know any other alternative to states. Therefore, so far nothing threatens the banks.