if he can do an objective, even-handed, and accurate doc on BTC it could be great. If he decides to be sensationalistic (focusing on bubbles, scams, user-unfriendliness etc.) not so good. I expect him to fall to the sensationalistic side. Judging from his other docs, I expect a "rock n roll" "in-your-face" half comedy/half documentary, and a lot of preaching to the choir.
Agreed. If you actually calculate the amount of weight he gained and the calories needed to do it you can see why he refuses to release his food log as well. Just from the math you can see he had to have eaten a LOT more than his own rules allow for. You can't beat math.