So if I had mega-millions, I think I'd like to buy a Fallout Shelter.
Not because I think I'll ever need it, but because it's just an eccentric stupid thing to own, and I could afford to.
And I'd have it like a fancy little home under the earth.
Also I'd have a very nice house with a home-cinema and a great games room and a large warm library, and a personal observatory.
And I'd spend all day in a smoking jacket.