I wouldn't give you my credit card number if you sent me an email about.
But no, in all seriousness, I'd get myself sorted first - nice house of my own design, gaming setup, augmentations, pomeranians, island in the Caribbean, whatever - then I'd sort out my closer friends and family - no islands or anything but maybe a house each - then I'd put half away to gather more dust (and by dust I mean interest) - then with what remains I would invest in charities and companies that I personally would like to succeed (such as space agencies, wildlife preservation groups, environmental groups and animal rights groups [not f***ing attention-whore ones, PETA], and game studios (FROM Software, for example)). Then with a quarter of the half I put away, buy solar panels and wind turbines and put them in the most practical areas.
The rest of it can just sit there until I decide what to do with it. And under no circumstances would I give any of it to anyone who asked. If I haven't spent it before I die and don't have any children, I would offer the rest up as a reward to the first person who develops an Armored Core in real life.