Re: What anime-related things would you buy or create if you were a billionaire?
I would definitely make myself richer, then I'd advance technology where I wished it(time machines and universe-altering stuff, even if it wasn't possible, I'd make it).
After that, I'd go back to the beginning of the world, if there was any, and make it so that the world had multiple universes in which each one of them had the characteristics as some of the greatest manga series. Also, I'd add the possibility to leap between these.
Since this is being overly ambitious, I'd just build some of the One Piece ships, as well as reconstruct places existing there and in Naruto(leaf village for example).