People apparently forget that if something very bad happens, whether it is a global war or a major natural disaster, we can expect that there will be serious disruptions in communication or, better said, an interruption of the internet. If that happens, the things that will be most valuable will be food, drinking water, and medicine, and of course, means of self-defense.
Of course, we should not be pessimistic, just realistic and prepare in time for every possible scenario.