It’s mostly natural disasters we’re preparing for. I’m concerned about a war’s potential knock-on effects on the food chain, although I haven’t dug a bunker in my garden or anything. And then there’s Brexit. If that doesn’t go the right way, who’s to say we’ll be able to get hold of the things we can get hold of now? But, realistically, we are mostly likely to be affected by flooding or severe snow. There have been times when we have been cut off, unable to get out. We’d need to be prepared if that happens again.
It isn't hysteria, and GMO isn't 'evolution'. One of the biggest issues for preppers and survival is that GMO seeds will not reproduce in the same way if the seeds are saved and re-used. In fact, in many instances (maybe all?), it's illegal to save the seeds and re-use them! It's far better to track down heirloom seeds that are native to your area and/or compatible with your climate. A good place to start looking is