Generation Z is a lot more digitally savvy than Millennials, so their target market are changing ...and they are changing to adapt to the changing customer needs.
They also realized that Brick n mortar operations are very expensive to operate and that those expenses has to be funded by high fees. The competition in the form of alternative digital payment offerings and Bitcoin's "Be your own Bank" principle....added to the threat of not having these high fees.
Are we going to wait for the Banking sector to disrupt Bitcoin.... or are we going to spearhead innovation to stay in front? You decide, if you want to stagnate.... or if you want to run in the front.
I don't see the activities of bank disrupting the operation of bitcoin, but I'm quite sure some banks would have to close down when a greater percentage of population decides to get wiser and invest in Bitcoin instead of saving in banks with peanuts as interest.