[antisthenes]

> The people in this story are still counting on quite a bit of society to exist to ferry them to their fancy secure locations.

I think if there's going to be any place that a bit of society is left existing after apocalypse will be somewhere in the US, perhaps much closer to where those billionaires reside than they think (so there's no need to run to New Zealand).

I think the better investment would be to literally convert some of your 'paper' wealth to physical means of production of basic goods.