Federal and international regulations require sophisticated bookkeeping and auditing. Banks and fintechs spend billions of dollars on fraud detection and security. Not only is it a matter of protecting their own self interests, but laws and reputation demand it.

> The point is that blockchains can have value, I don’t know anyone reasonable who doesn’t believe this. Git is technically a blockchain.

Git history doesn't have monetary value. It has practical, functional value.

For Git, I don’t see how that’s relevant. If things that don’t have monetary value can be secure at the protocol level why shouldn’t money be just as secure.