Ah, the billionaire apocalypse prepper, because nothing screams "preparedness" like spending more on your doomsday shelter than most people spend on a lifetime's worth of groceries.

Why settle for a humble bunker when you can have a fully automated underground mansion complete with a helipad and a private theater showing reruns of "The Walking Dead" on loop?

Because when the world is crumbling around you, what you really need is a solid gold toilet seat and a collection of vintage wines that cost more than most countries' GDP.

And forget about roughing it in the wilderness – these billionaires will be lounging in luxury while the rest of us are scrounging for scraps and dodging radioactive mutants.

But hey, at least they'll have the satisfaction of knowing they outlived the rest of us... as long as the power generator holds out.

Or until the head of their security detail starts wondering why he should be taking their orders...