In the classical sense, banking will change now. However, I do not think that the banks will disappear in an instant, because banks with such a large amount of money will find new ways. I think banks will transform into a new economy.
Well, an institution who have been in existence of hundreds of years now won't simply disappear or become obsolete. Banks as we know it learn to evolved as well, now we have on-line banking (obviously, you don't get to go to a physical bank to transact).
and now they have somewhat a new competitor which its crypto, but then again I doubt that they will simply step aside, they will learn how to play with this so called crypto and learn to adopt, simply as that.
I believe what he meant is banking being revolutionized to the point that it no longer resembles it past self. This could mean that banks are already incorporating technologies only known from bitcoin and cryptocurrencies. Which is really good in itself. Imagine banking running on blockchain technology. You can transact, get money, send, and withdraw everywhere, long as you have internet.