Peter Schiff is a good example of someone who understands the economics but not the cryptography. He also isn't afraid to think independently but he has a weakness in that he is dismissive of that which he doesn't understand. At this point he should just say, "I can't see how it can work," and get to doing his research on it. I'm afraid his personality will make it take quite a while before he gets around to it, though.
He sells silver for a living.
Ironically, I never thought I'd buy another ounce of silver but wishing to re-balance a bit due to increased BTC valuations, I may in fact do just that. Looks like a screaming deal these days to me (though I liked $4.50 better...)