I have had this happen three times now. First Chase closed my account without notice due to Bitcoin dealings. Then Wells Fargo. Then PNC. Each time Coinbase attempted to execute a trade I had placed and the bank account was frozen, my Coinbase account was automatically frozen as well.
Wow that's quite a bit of bank account closures. How large were your transactions? It has nothing to do with btc price, but the fiat amount you're trying to transfer will make or break you. It's my experience that once your bank account gets closed, you're actually banned from that bank.