I agree with you completely on this @valued-customer.
This letter is an admission of the threat they face. It is against the policies of the bank because they realize that the purchase and utilization of crypto is a threat to the bank. The banksters are a lot of things, completely stupid is not one of them. They see the foundation of their money making-empire and humanity controlling fiat based mechanism collapsing. What really gets them is there is nothing they can do about it. They are completely powerless against the blockchain or the app called crypto.
There is a new game in town and they werent invited.