To those or you who are saying that you are not prepared:
First of all, we cannot possibly be prepared for ALL eventualities, as you know. But we CAN act based on the signs we notice nowadays. Likely economic collapse, for example. What resources do you have right now, and what can you do with them? Think in practical terms. Canning, buying canned food, stocking up on medicine and drugs you may need (specially if you suffer from a disease that requires constant medication), on essential goods, having a single place in your house where everything that you hold most valuable or that you would need to take with you in case of an emergency is "ready to go" (important documents, something you would never want to leave behind, etc.). If you can and haven't done it, take as much money out of your bank and buy gold or other metals (even cash is better under your mattress for as long as money is worth anything
). There are just some examples, but you would have to think about your specific situation, and what you can do NOW, before you get the "NOW!" signal. It's better not to count on your ability to think clearly at times of crisis. In fact, I think that you have a waaay better chance of thinking clearly if you have done all you could, learned all you could, and applied that knowledge before that time comes. Everything you do now, is one less thing to stress about later. OSIT.
Another thing is that when you prepare in small ways every day, your mind imagines many different scenarios. That is also good practice, and less stress were those situations to become the new reality.
And, anything you do now is not wasted. If, say, nothing happens (I doubt it, but let's say it doesn't, or that it takes a lot of time to happen), then you haven't lost anything. In the best case scenario, prices increase just a bit, but you've got food in storage and save money. If you don't need to take your important documents in a hurry, at least you always know where they are when you need them. Etc, etc. Nothing is wasted. The point it to ACT on the knowledge you have now, and you will at least have taken many steps and be as ready as you can be for other challenges.