I am not doubting you or saying that you are wrong about the statement on banks warning their customers against crypto related dealing but I have a question.
Have you checked out how active Crypto-currency exchanges are in Nigeria, I refuse to mention some name. And do you know that their are huge peer2peer transactions going down on that exchange? And peer to peer involves the buyer send naira to the sellers account. This has been the situation.
We should know by now that the government can not stop crypto-currency no matter how hard they try.
Still this doesn’t actually even align with the warning of Frankolala, yes Nigerians are increasing daily in the use of cryptocurrency but except there is a new policy that the government of Nigeria has relax their restrictions on cryptocurrency if not it is very dangerous to actually use your account bank for anything related to purchasing or selling of cryptocurrency, simply use P2P on exchanges still available for that.
P2P doesn’t mean the Naira wouldn’t come to your bank account but it will be from a fellow traditional bank and not having anything related to bitcoin attached to it. Using credit card and its likes is where the quoted post is actually warning against, we all know how the 2021 ban made many who use traditional banks for transactions had their account freeze