Comment by larsrc

I like the "social wallet" idea, though no blockchain is needed for that. But there's a real danger that if enough of your friends get compromised, you can get compromised as well, and that can snowball. And most people would not be secure enough. So you'd want to have someone more secure as part of your "social set" - a large organization that actually does serious security. But then you're again depending on some large organization. You could require at least one of several large organizations, but that in turn reduces security.