Tech billionaires seem to be doom prepping. Should we all be worried?

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13. Guess he's not worried about "air pollution"...

Breathable air? We take it for granted.
It's a funny thing, that atmosphere. Seems we can get along with making water (a bit expensive) and growing food (inside is tougher and not as productive) but that atmosphere thingy is maybe more important because it's really everywhere. There are filters to try to keep out the bad stuff, but sooner or later those need changed since they don't last forever. AND...some of the stuff in the "atmosphere" may not be able to be filtered out, no matter how hard you try. Oh, people of means maybe can do it for longer than the rest of us, but in the end, when you can't breathe, nothing else matters.

If you live underground, you need to bring in "air" and that air can be filtered...to an extent. Sometimes things get into the "air" that nothing can stop or remove. Living in a billion dollar bunker, you are more dependent on clean air or water or even food right away. And if something causes problems with food and water those can be usually be controlled. But bad things in the air can't always be removed or controlled. See Covid 2020!

So while a billion dollar bunker may be a temporary reprieve from above ground catastrophe, there's no getting away from needing "air"...clean, SAFE, air and if something was carried by that air into a billion dollar bunker that happens to not be filterable or controlled and can't be easily removed or whatever, then nothing else really does matter.

Not indoor tennis courts...parties...eating...sleeping...or living.
And sometimes, bad stuff in the air isn't natural.