It is too early for them (government and banks) to ban bitcoin and other cryptocurrencies. It has a huge potential, so their game is to wait. While waiting, there will be many regulations, but crypto will not be banned as it brings more value to the society than harm.
Remember that government's goal is to benefit people, not to steal from them, so decision to ban crypto would bring more harm. They would not be able to communicate with exchanges, other third parties to confirm who spent their money, and who received that money.