“Three days after signing, notarizing and registering all required documents necessary to collectively devote their entire fortunes, stocks and options to an irrevocable trust in support of renewable energy implementation, social welfare systems, sustainable development in the global south, returning resources leased to foreign companies to local citizens, and solving wealth inequality (with trustees selected from currently-living Nobel laureates in chemistry, medicine and economics, the IPCC, and the WHO), Elon Musk, Jeff Bezos, <list all current members of the boards of Nestlé, Google, Apple, Sinclair Broadcasting, United Health, and other insurance conglomerates by name here> all make the collective mistake of riding cybertrucks to the second trust meeting and perish in the resulting inferno, which miraculously leaves no lasting damage on infrastructure, nor causes collateral injuries.”

Still a chance of splitting up the money with the descendants cannibalizing each other and fighting over the owning classes corpse.

Generally you don’t need a will to keep wealth in the family, anyway.