If Bitcoin hits 100, it will be game over for sure. ...
I doubt it will be "game over." Sure, there might be some weirdness with confirm time if it's a sudden plunge & miners shut down their farms en masse. And it might be "game over" as far as Pinky and the Brain world-domination fantasies that permabulls keep trotting out. But, as long as there are a few guys mining, Bitcoin will serve the purpose for which it was created--small-scale blackmarket commerce. $100/BTC is just about right for that.
We are much closer to Andreas Antonopolous's new book "Why Bitcoin failed" becoming a best seller than most people realize or are willing to admit at this point sadly :/