Discovering an asteroid full of gold, with as much gold as half the earth to put a modest number, would have huge impact to the labour market. Anything conductive like copper, silver, mining jobs would all go away. Also housing would be obsolete as we would all live in golden houses. A huge impact to the housing market, yet it doesn't seem such a bad thing to me.
>We're already at a point where we're counselling elders to ignore late-night messages from people claiming to be a relative in need of an urgent wire transfer.
Anyone can prove their identity, or identities, over the wire, wire-fully or wire-lessly, anything you like. When i did go to university, i was the only one attending the cryptography class, no one else showed up for a boring class like this. I wrote a story about the Electrona Corp in my blog.
What i say to people for at least 2 years now, is that "Remember when governments were not just some cryptographic algorithms?" Yeah, that's gonna change. Cryptography is here to stay, it is not as dead as people think and it's gonna make a huge blast.