I would mock them, call it a ponzi scheme, call them shills, etc.
I think Satoshi did it right. He said -
> If you don't believe me or don't get it, I don't have time to try to convince you, sorry.
He said this when Bitoin was still extremely niche and inexpensive.
But because you asked, I'm going to tell you what the personal event taught me - people are irrational.
Watch "Gods Must be Crazy" and try to understand the allegory of the bottle and what effect it has on the tribe.
That's what Bitcoin has achieved in cyberspace.