Wholesale rocket engines, maintain spaceplanes, repair and wax satellites, collect space junk, organize space tourism, develop the solar system, and lead the way forward for human civilization!
And, on the side, enjoy a few things I always wanted to do but never could.
Like building a real mecha (so cool).
Making a next-generation electromagnetic railgun and laser-defense battleship (awesome).
Investing in the anime I like (because I'm rich).
Financing my own hard-science-fiction blockbuster (because I can).
And so on and so forth...
I owe it all to the little green men's contributions.
Disclaimer: No little green men were harmed in the making of this story.