What do vegetarian zombies eat?
But seriously, i think it's fairly probable that a challenging economic collapse, or at least severe depression will happen first in America and then around much of the World (to a lesser extent) in the near future. Some might call that "paranoia", but i call it realism and reading inbetween the lines. I do think learning about backpacking will help in this for sure and being fit and healthy will help for sure. (though you don't want to be a lean weight lifter type when food suddenly becomes scarce, for a few reasons).
The above is why i'm always somewhat torn between light weight and durability considerations. If someone like the above happened, you will want your gear and clothing to last a long time.
But then again, i have very, very little fear of death so i won't sweat all the above too much.