In the bitcoin era banking is not so important at all because  every thing we can resolved with bitcoin itself so the conventional banking system has no specific role on it. If some body is undertaking a deal between  a firm or an individual here with bitcoin  the buyer and the seller only  knows about it with out a third party interference such as banks. Bitcoin saves the processing time and the processing charge and the transaction  between the buyer and seller directly..So the bitcoin is more convenient for the international trade.