Why does the OP call the fund manager crazy, just because he says bitcoin is worthless shit? He's not crazy at all, in fact he's the exact opposite of crazy. He is one of the smartest men out there.
Let me tell you what pure crazy looks like ---- buying bitcoin at the peak after a large run up and see it crash hard. That is what crazy look like.
If it isn't clear by now that the title was blatantly exaggerated sarcasm, I chose that title because otherwise, it would just seem like I'm a hater that wants to spread FUD in a Bitcoin forum ;-)