The banks will still occupy those buildings in 5, 10 or even 20 years or more. Make no mistake about it, the banks are not going anywhere, any time soon. They will always find a way to survive. I think there is a much higher probability that it will be the cryptocurrencies that will not be around in 5 years...The banks will do just fine.
RE: Banks, banks, banks... wonder who will occupy all these buildings in about five years ...