In a crisis Bitcoin becomes a good alternative to fiat. When banks start going bankrupt again Bitcoin usage those countries will increase massively. Bitcoin atms and Bitcoin Paying technology will rapidly spread out, and once the infrastructure is in place people will continue using it after a crisis is over.
Bank turning to bankruptcy is not the ways banks are today. That kind of bank is really a crap. There are lots of banks per country who really established a good and stable financial institution. In the first place why choose a bank that doesn't stand for really a long time.