I'm an independent, fee-only wealth manager, so take this comment in stride . . .
The answer is "it depends".
If you truly have "more money than I can ever spend", then you might not need to take much investment risk at all. While you're only 20 years old, you can still go through the exercise of thinking about what you want your future to look like in terms of goals, objectives, dreams, etc.
Of course, if/when a significant other comes into play, things change. Even more so with children.
Whatever you do, don't lock yourself into anything -- you don't want to paint yourself into a corner.
Do you have an interest in another startup? This will impact your liquidity and ability to take risk elsewhere with your finances.
If you really don't buy fancy stuff and can live within your means, don't let anyone talk you into anything just because "you're young" or any of that bullshit.
If you want help from a professional, interview at least 5 candidates, all of whom should come from recommendations from friends, family, board of advisors, etc.
Bottom line. . . it's your life, and you only get one shot to make the most of it. Your need to take risks with your money is only dependent upon what you want to do in the future. If you have big goals and/or short time-frames, this might call for more risk. However, if you have modest goals and longer-term time frames, you might need to take little or no risk, but be sure to take taxes and inflation into account.
This is a challenging topic to address online because the answer is and should be highly personalized based on your own situation and preferences.
Best of luck with it, and congrats on the exit.