What banks can do better than bitcoin. If bitcoin also have almost all features of banks. Only must have an internet and you can use bitcoin already.
And bitcoin has faster transactions than the bank and more secure I guess.
Banks hate bitcoin because bitcoin is building up a parallel economy which is anonymous in nature. Banks and governments will be furious if money is free distributed in the economy without their intervention. Money is the most powerful weapon to control people and if it is being distributed freely, the power of control will be shifted from their hands.
That's the reason no bank will support the bitcoin or blockchain technology.