First, buy the services of a financial advisor. Run a very long list of ideas past them to see what's plausible, what would make a positive difference in the world, what would likely become a self sustaining positive thing after an initial investment that I can afford to go without a return on.
For myself, build a house. Pick the exact location I want. Customize and overbuild everything. Backup power and solar panels. But from the outside, make it look exactly like the majority of the houses in a 1 mile radius. Except mine is capable of withstanding nuclear war.
Also, health care to the max is high on my selfish list. I want a reputable doctor to show up at my house each month to check on things and answer all the odd questions about a cough I had one time or whatever.
For my family, buy them a few nice things, set up a trust fund that pays out an actual living wage to each person and include a standing appointment with a financial advisor as well as access to their own doctor who makes house calls.