~snip~
As long as people don't use banks anymore, they will bankrupt.
If only it were that simple, but in most developed countries everyone who is employed and receives a salary or pension must have a bank account. Besides, how will you get a loan if you don't have a bank account? Here, where I live, I guess 90% of people have some kind of loan from the bank, whether it's because they bought a house, an apartment or a car that way.
Banks will not disappear just like that, because regardless of the existence of Bitcoin, it is still only one alternative that has been accepted by very few people if we take into account global data.
As for the policies of banks towards clients who invest in cryptocurrencies, this is nothing new, because not all banks are equal when it comes to this - and we have already seen many times that they often know to change their rules. If we just look back and remember Jamie Dimon and his views on Bitcoin, then it is clear that these are very fickle people who think one thing today and another tomorrow.
But as already mentioned, it is possible that they are just playing a double game and trying to scare their clients and cause a price drop - although I doubt that they will succeed.