I would invest a lot of it somehow
Then I would buy:
Several Lamborghini Countaches (Countach's?)
A Mercedes SLS AMG
A Ferrari 328, 308, Testarossa
Several Porsches, at least one Targa top from the 80's <3
A Maybach 62 Zepplin
I would pay to have some one-off cars built to my tastes
My dream houses (Only one of my dream houses is ridiculously big and gaudy, the others are not in Beverly hills but are pretty.) I don't plan on spending much time at home so I don't need something huge and fancy, just in a safe neighborhood.
An unnecessarily powerful computer
A skyscraper or two in my city (why not?)
A giant field to landscape it <3
A bunch of paint and canvas
I would start a charity to make people independent rather than dependent on more donations.
I would adopt some cats and make a cool setup for them
I would build my dog a cool af dog house because she's amazing
I probably would buy a small boat, but nothing fancy
Fried Chicken. ( Oh gosh, I would get fat)
A charter bus - I would make it cool AF on the inside. Probably not, it would sit there and collect dust.
College tuition
Ehh...I would give my family money
Maybe I would fund a scholarship too.
I would probably promote propaganda on major TV and radio networks :>
I would give a lot of money to my school since it's cool AF
I'd also collect corvettes of every generation
EA is probably worth more than 1 billion dollars, so I would dream about purchasing them and killing them off, and then giving Maxis a lot of money so they can make Sim Cities that don't suck.
Oh, and a convertible, red, first-gen Viper. The only convertible I like. (unless you count Targa top corvettes and porsches as convertible)