Banks are still extremely oblivious to how powerful Bitcoin (and all other virtual currencies for that matter) is and how it will eventually start to prove their business model as obselete.

Banks fear bitcoin, becuase they see its potential. Many banks have looked into the blockchain technology and are trying to replicate it...purely because the technology is so powerful and out-does all banks by people preference by far. The only reason bitcoin has not taken over yet, is because of the peoples unawareness of it.