They can close/block an account if they find anything suspicious but refusing is not a correct step. I am sure JPM will be snapped a huge fine if the company moves to court. How can a bank like JPM that handles daily transactions worth 3 trillion USD everyday, is terrified by cryptos?
They have a reason to file charges if they cannot come out with a good reason why they are allowing them to open a bank account, I think they should file this is going to be a landmark case and we can score it big if we win on this one, which I'm pretty sure will win.