A Wired investigation reveals that the tech mogul’s top-secret Hawaiian estate will feature a 5,000-square-foot underground bunker and will generate its own energy
This one defies Betteridge's rule because he really is building a bunker in Hawaii. Which will work out for him really well if the Kauai volcano erupts and covers it with lava.
Unfortunately, that's not how the Hawaiian hotspot works. Kauai is the second-oldest and northwestern of the islands in the state, and since the hotspot has been moving southeast the only places where activity occurs are Maui, the Big Island, and the Kamaʻehuakanaloa Seamount to the southeast of it (which is expected to be a new island in 10k years or so).