If I was a truly evil banker, this is exactly what I would do: print unlimited money, use it to buy all bitcoin at any price for myself and the entities I control. And hire hackers and all sorts of murderers to take bitcoin away from those that do not sell. That would help me keep the power while restraining bitcoin from causing any power distribution and decentralization.
But luckily, there do not seem to be enough conciously evil bankers to be able to pull this off.