No banks doesn't deal with bitcoin because bitcoin is still not considered as legal money in our country so till now no banks accept bitcoin. but banks are making themself ready for future with such own currency.
Yes currently they are not dealing in bitcoin but I think in future when the users of bitcoin will increase then I am hopeful that they will start accepting bitcoin and may be they create a separate system for that but currently they are not accepting bitcoin in banks.
well, maybe for bitcoin is not legalized, maybe banks will never accept bitcoin. it might make some banks have a poor performance, because it receives something that has not been legalized. but, when the bitcoin has become something that is legal, it is very much a bank will accept it.
Banks have no reason to adopt something that isn't properly usable as full time currency solution. Banks will much rather have their own digital currency created that is linked to every dollar or euro that goes through their system. It will take away all the annoyances people struggle with right now when it comes to using Bitcoin as currency solution. Who doesn't like instant and free transactions that also happen to be insured?