Hey I am NOT responding with any specific knowledge about what happened to Tim Draper, yet I understand that it is healthy to maintain a decent amount of skepticism about whether public folks are good for their word.  

I doubt that any of the BIG players like Draper sell large portions of their coins and play around with the market in a way that you are kind of suggesting.  Surely, they might skim off 5% or 10%, but I would imagine it is not easy getting your hands on a bunch of coins, again  and at the time  that you would like, so it is much easier just to hang onto the vast majority of coins through the volatile periods.

Furthermore, Draper pretty much made various claims about bitcoin going to $250k or whatever the hell it was, so I doubt that he is pumping for some kind of intermediary profit attempts, or even gives too many shits if his holdings might be fluctuating many $10s of millions per day, perhaps even into the $100s of millions per day arena.  I would imagine that he has a decent surplus of coins, too, so needs to figure, from time to time, what kinds of projects, in which he might choose to invest  just to keep himself entertained or as a kind of influencer in the space....  

I better stop while I am ahead, because I was starting to ponder  some speculations about how he might be spending some of his time on lambos, hookers and blow, but perhaps he is bored with that kind of stuff... unlike us newly rich fantasizing about when we become newly filthy rich, we would like to emphasize the filthy, since we are going to be newbies to that part of it, unlike Draper.... hahahaha