The bank needs clients, but banks operate in accordance with the law, because they are afraid of losing their licenses.
My accounts were blocked several times, and I managed to solve all the problems without a lawyer. You don't need a lawyer to find out the reason for blocking.
If you want to exchange cryptocurrency for $ 10,000, open accounts in 10 banks and withdraw $ 500 2 times with an interval of 1-2 weeks. Do not withdraw cash immediately after receiving the money, wait a few days.
Never send money to the account where you receive a salary, pension, benefits, etc.