I heard that too if not wrong in my country there are a bank who close a guy's account because involved in crypto. That is when i am not really intense in crypto but when i make bank account and they ask where is my money mostly come from, i said that i am selling online because not want that thing happened to me too.
Why would the bank want to know about your business is and what all transactions you will be getting, so do you need to submit your source of each and every transaction. If that is the case all you need is to ask the community from that particular country about the safest bank to make cryptocurrency transactions.