So weird if the banks really ban their users because of using it or crypto transactions.
But, actually, how can it be? is crypto illegal in your country? if yes, it makes sense.
Bank probably only follows the rules and will always act like that.
It depends on rules and regulations on cryptocurrency in each nation. In some nation, cryptocurrency exchanges to fiats are prohibited by laws. In some other nations, such exchanges are not prohibited but are not protected by laws and governments. So go ahead with your cryptocurrency exchanges but if you unfortunately get scammed, you won't be protected at any levels. Worse when you are not scammed by anyone else but if you have trades in bank transfers with a scammer who stole money from someone else, victims filed support to police. Hence, banks are required to freeze banks have relations to that scammer. Your bank account will be frozen or at least some amount will be frozen. It is terrible.
However, if you want to make any transaction, maybe you can use a P2P transaction, or I also wonder how you can transfer the money to buy it.
P2P trades are risky as I discussed above. Choose trusted trade partners to avoid risk of bank account freeze.
And about PayPal, yeah you can buy crypto at PayPal but you cannot withdraw it, only for trading there.
Except that you use PayPal or gateway and transfer it into a certain exchange.
This way maybe longer because you need double ways to get into certain exchanges. But I think it will okay as long as the ways are normal and also easy to do without any complication and also challenges.
People will still use PayPal if they already have money in PayPal. They will easily to use PayPal to convert their fiat to btc even it is only a virtual credited figure, not real amount of btc on PayPal.