I'd buy a theme park and let nobody else in. Then I'd buy a tropical island, a team of the absolute 1337est engineers/researchers in the world to develop 500mpg cars, cures for cancer, etc (all funding provided by me), buy multiple super-powerful computers and use some as game servers, buy gmod10 , buy a mansion, build a mini-mansion at Christina Lake, buy a private jet, buy a nice-ass car, and put half of the rest into the bank for interest, and donate the other half to charities.
that is awesome 0 even better at the cube one... i don't think i would buy a mansion...but a decent house in a suburb and "pimp my house" be a closet x-onaire. of course on my island i would have a big ass ramp that i would fly the worlds finest cars off into the ocean...of course not to cause pollution i would control that portion of the ocean and i would go and find sasquatch and thelochness monster
id wouldnt change anything xcept i would buy a big lot and build a big house for any1 that wants to come in ^^ like 200 rooms
i would buy an island and make it a country. then i would rent it to company's to do stuff that is illegal in their country.
i would put 1/4 of it into NASA thing, i want to know if aliens are out there xD buy something nice, helping people, whatever ... i don't know