In my opinion, the banks are just scared of loosing investments and deposits from customers which they in turn lone out at huge interest rates on pay back.
Yeah it is big fear of all banks because now they know people have better option than us so they are afraid to be ignore and they know it well that in near future all investors will only invest in bitcoin, as it is the best choice for us, no offence for using it and no offence for dealing, I am sure soon the price will rise high so they are afraid and it is true that investing in bank has almost zero profit as compare to investing in crypto currency.