Is this why Larry Ellison wants the island of Lanai?

The Hawaiian island has a very special landmark...

Larry Ellison has assured residents of Lanai, the Hawaiian island he has purchased for about $500 million that he plans no changes to their homes and resorts.

But what about below ground? The Lanai volcano is dormant, it last erupted about 1.2 million years ago. Perfect for being hollowed out and turned into the world's best billionaire hangout.

If we hear of him purchasing high energy lasers from failed fusion reactor ventures we might need to start worrying.