The son of Donald Trump, Eric Trump, also the executive vice of the Trump Organization said banks can extinct in 10 years if they do not watch what is coming. I think what he meant is that if banks do not support cryptocurrencies.
He said modern financial system is broken. It is slow. It is expensive. There is nothing on the blockchain that can't be done better than the current financial institutions is working. Banks not working during weekends also not working more than 8am to 4pm which can be a disadvantage to those that is not able to pay money early before 4pm on Friday.
In the long term, there will probably be a lot of innovation that will be done by the banking sector and that must be done to maintain existence. Now there are many banks that support crypto and even our country is regulated regarding this, especially when converting crypto to fiat currency. Apart from the applicable taxes, I think banks have tried to make an approach as another benefit of financial institutions so that they can maintain their existence on the journey of the Bank itself.
If they are protected by regulations in each country then it is impossible for banks to go bankrupt as a whole because there are certain aspects that can be done to maintain the existence of the bank. But if the Bank is not affiliated with the government then I believe that it is very likely that such a Bank will go bankrupt and many have happened now.