A travel lover said: “I have a bucket list of astronomical objects and phenomena I want to see before I kick the metaphorical one, so I'd use that time to travel and see the ones that I haven't crossed off.”
A self-proclaimed geek prefers to build themself a lovely hobby shop, do 3D printing, woodworking, maybe some metalworking too, electrical stuff, a bit of side project programming, design some tabletop RPGs, play some games, and do a little traveling.
For one individual, a work-free life with so much money means they can adopt several kids, travel, fund charities, go back to school, get way more involved in local politics...
“I want to learn to be a damn good guitarist and chef,” someone comments. But most of all, they'd want to spend every waking minute with their mom. Awe.