I agree with most of the things that have been said in this thread so far but I'll take it a step further. I believe that people should learn skills on how to become SELF-SUFFICIENT. That is the ultimate survival skill. Own guns and know how to use them, know how to grow your own food, know how to hunt (something I am trying to get acquainted with currently), know how to provide shelter for yourself, invest in a mechanical vehicle that doesn't solely depend on electronic/digital devices (any vehicle before the 1980's would probably do), and expect the unexpected at any time of any day. If something catastrophic were to happen to the US or the world, and we didn't have our devices, people would literally have NOT A CLUE on what the hell to do and it would be like ******** savages freaking out and killing each other.
Most importantly though, know how to use a gun regardless of doomsday predictions or possibilities. I'm a fan of the phrase "Guns don't kill people, people kill people."