Are you a pick and hold type of player, or are you a day trader? Or both?
Regardless of which, here is my suggestion. With your size of port, I would only invest in movies/OW derivatives that give the biggest bang for your buck: that is, 1)movies that are going to be releasing in the next couple of weeks as well as 2)movies with news in the movie forum. These movies are way more volatile and thus, if you play them right, you can make the most profit in the shortest amount of time. For (1), you know which movies these are and know how much money they and their corresponding OW derivatives cost. For (2), this is where your question comes into play: how much money should you save for movies with news? Well, I would invest what you can on (1), and whatever you are left with (which may not be much) you should spend on (2).
There are about a billion of opinions on how to invest with <$100M, but this is my suggestion (that is, the easiest suggestion without writing a book of an answer).