Well we have seen that for years now their 'accounts' basically state they only continue as going concern because of the support of Ukio / UBIG / Vlad. Surely if that support mechanism is totally removed, then they'd have to shut down. Wouldn't the directors become liable for any further losses because they would basically be trading while insolvent?
If the bank isn't ploughing any money in, and it certainly seems that it isn't, then it's not going to be a case of them running out of money, surely it'll either be the above situation, or whoever gets their hands on the remains of Vladcorp calling in the debts. Certainly from my limited knowledge I can't see how they can survive the collapse of Ukio...