I’d donate a quarter for 4 years to my city to create a biking network, with some smaller portion donated after the 4 years for maintenance.
I’d almost certainly help the local schools get up to date teaching materials and try to supplement their income by literally just gifting them money. There’s only around 1000 teachers in my city, so it wouldn’t be too hard to do that.
Obviously myself a senator and representative.
Then idk. Get a personal chef and personal trainer?