They are living in mansions and have millions in different properties, even if BTC went to 0 they'd still be richer than any of us here will ever be.
Anyway, they said they aren't planning on selling. They're one of those people who believe we might go to $50k and I respect that. When you already have a private yacht, a number of residences, a couple nice cars, all you're looking for is recognition, fame, something you'll be remembered by.