One hundred billion dollars? Let's say this I HATE money.... All it leads to is people getting greedy and even violent, and lose their concience. It is needed, and that's all it is. I do need more than I have now, but being rich? That's the other extreme.
There are a few things I really need so I would purchase those at last, and get my driving license, and I'd try to hire the right people to translate and market the novels I write. Of course, it's not that I need my novels to sell for a living then, but if I can reach a great audience and thus reach those who'd love the stuff I write, then I'd be happy... The money I'd earn on that has always been nothing more but a nice bonus coming with it.
I might also find some people who can help me in how to store that money, so I don't have to worry about future financial issues. I did promise myself to make a donation to at least three charities. KWF, which is the Dutch foundation investigating and fighting cancer. Foundations related to autism (being an Aspie myself), and I've been in a huge debt in the past. Not that I need to pay it off anymore as that already happened years ago, but in that time I was dependent on the "voedselbank" were volunteers give food to poor people who can't pay for their food otherwise, and if I suddenly had more money I may likely ever need ($100 billion probably is.. At least if we mean US$) the least I can do is make a donation to them to repay them, and helping them help other poor.
I've always been pretty target-result-based. Pay what I must and buy what I need. Buying an original Van Gogh, just because I have the money to do so, that is something I really really hate. All I can do with an original Van Gogh is hang it on the wall and fear for thieves to steal it. Of course, when buying stuff, I value quality over a cheap price if I can, so that is something I'd certainly keep in mind. And I may buy food that is better of my health...
Just doing crazy things of the heck of it.... Naaaah!