[sweetbitter]

Well, you should consider what exactly would be hacked. Banks don't really hold huge amounts of gold or physical cash anymore, most of what they have is 'credit' and debt.

Cryptographic currencies are not credit, they are the gold. They are what gold would be if it were easily divisible and could be transferred anywhere, instantly, for only several cents worth of transaction fees.

Despite how quickly you can transfer cryptocurrencies, you could secure it as well as you physically secure gold if you really wanted to. The problem is that there are a bunch of businesses who are holding peoples' gold for them in such a way that bidirectional channels exist between front-end machines and back-end machines that have the private keys on them, and there is no regulation instructing these wannabe banks to perform cryptographic signatures on airgapped machines. It is as if Fort Knox were just leaving all of its entrances open.