Funding the Effective Altruism movement e.g. recommendations of Givewell, ACE, 80k etc

Big ambitious projects (new greenfield cities, speculative engineering, gundams, whatever)

Fixing academia

Swim in their money like Scrooge McDuck

Lobbying for better urban planning/land use reform

Paying taxes

Giving back to the people who helped them make it (employees, etc)

Public works projects

Reject the idea that others should heavily influence what they do with their own money

Bio projects in countries with fewer regulations (gene therapy, embryo screening, etc.)

Fund economics education for the general population

Protect whistleblowers

Organize crypto giveaways

Sponsoring therapy sessions for people who can’t afford it at top therapists