Time for what? That's my point of the above question: why?
Google "prepper". There's a whole community out there of people who prepared for the absolute worst.
I witness a funny side effect of focusing on the body almost daily. I live in snow country. The locals here are bundled up in layers of sweaters, jackets, scarfs, hats. I am just wearing a t-shirt and they look at me like I'm an alien.