What did they tell you that the reason was ?
A bank would never close your account for no reason, and the reason for that is that in every case thy profit from you (except you can´t repay a loan, but you wrote you lost money)
I have seen a case where a person's bank account was closed (funds were frozen) to repay the loan of that nation. Yes, it is moral responsibility of every citizen to contribute to the growth of the nation but in this case, his funds were used without his permission. The biggest benefit we receive in using bitcoin is that the funds and 100% in our control (unless kept in web wallet).