Banks don't close a customer account like that , where have you see this ? "Suspicious" is not enough to decide to close the account of anyone LOL....
There are banking laws and customers rights. It's not the cow boy period where banks talk and you just shut up and obey
Banks just following orders from the central bank, if you are not in the list of suspicious people then there is nothing to worry, just to correct your statement bank does not close suspecious accounts but they consider it under freeze. You can only withdraw that once your name will be cleared because you were able to justify the source of your money. There's nothing to be afraid or actually, the government will always protect our banking right.