SWiFT- the network all major banks use to transfer money is not secure.
The issue is that state backed hackers from Russia and China will always defeat these systems because there are no repercussions to them. Basically, these hackers are the equivalent of a pirate boat rushing out into the ocean to rob a cargo boat then going back to safe harbor in their own country.
We need a global government that can enforce basic laws against theft everywhere. Only then will these attacks be stopped.