I would hold them and I will. I don't have that many bitcoins but I think the price goes up so I'm making lot of profit with that I have. I would totally risk to be a billionare
May I ask why? Holding while the price is falling is almost as stupid as selling while the price is climbing!
Hes probably looking long term though, if he can out wait the drop and wait for the rise then theres no issue for him