BitCoin.
We looked at him sideways and said "Internet FunBux"? So we can do what with it, buy internet hookers and heroin? (Pretty much all you could buy at the time.)
So yeah we turned it down.
He continued putting some of his own money into it on his own and made a decent killing.
I calculated out how much I would have made had we gone down this route and it was in the high double digit millions. (assuming we held onto it throughout.)
I still get sick thinking about it.