I would invest part of it to start a new company of some sort. Then I would pass that company down to my children so they would be rich too.
Obvious things like buy my parents and myself mansions, buy every UC neopet I want, buy all the collectibles and games I want, buy lots of designer clothes/accessories, get beauty makeovers, go on very fancy vacations, and make sure the people who I dislike see all of this clearly. I would have a nice house in a wealthy neighborhood with nice weather. The house would have a personal park, huge swimming pool, personal garden, and be built like a palace. I'd spend a year or two doing nothing and just going on vacations before I start a company. I would sit as a CEO in that company's headquarters all day thinking of how to make even more money. Through my company I would donate to charities to keep a good image. I'd say that I'm still the same person even if I get $100 million: logical and ambitious. There's always more that I can have and I don't want to just sit there and do nothing for the rest of my life.
Right now my goal is to finish my degree, get a job fast, get as much raises in that job as possible