My dad's retired and in Europe (I'm in the US at the moment), and he spends quite a bit of time investing. He'd remembered I told him about bitcoin a while ago, and called me on Thanksgiving to recommend I sell half my bitcoins because it's now over $1000, so why not cash in half the profit so I can't lose?

It's hard to explain to someone, the lottery notion of bitcoin, the all-or-nothing of it. Also hard to explain why people, especially younger people, fall in love with the genius and balance of the technology. Either it's going $10k+ or it's at zero, and I'm ok with it going either way (of course, I have a *preferred* way it would go).