Well, this is what I would do.
First 10 million I'll waste to move to Japan, with a big freaking house ... two houses. I'll invest 150 million somewhere to gain profit, that leaves me with 140 million. Waste couple of hundred of thousands to learn Japanese, or some sort of, while living in Japan. Build my own anime company (I'm serious) and get some of the best talented people, well close to so that's couple of other millions of dollars.
My other idea is, go buy a Viper, or a sweet ass ride. Get a big ass house, ... a really big freaking house (20+ rooms, etc). Big property. Hire couple of people to do fansubbing, and also hire couple of other people to translate visual novels. Yes, I'm serious about those. Mostly, to do the translating.