But you can't spend any Bitcoin unless you possess some wallet's secret key. Explain to me how that poses a comparable risk to the egg baskets that are today's financial institutions. If your secret key isn't compromised, there's just no way your coins can be transferred. Furthermore, in the event that any kind of mass fraud takes place which exploits some flaw in the protocol itself (contrasted with a flaw in an exchange platform or something similar), the ledger could be hard-forked. It was done after Ethereum's DAO debacle with /relatively/ little consequence.