You should prepare for disasters as they really happen. Could you survive OK in Portoriko (or your local type of similar disaster)? Would you have way to generate power at least to have light and radio? Do you have friends in other countries/places that would help you relocate? Do you have water and food for few weeks to survive initial blast? What about medicine you need? Do you have cash to buy basics until electricity is setup again?

But you are right that if you prepare too well. So well that it's visible, it is likely that it will be taken from you. Or you can end up as that guy who prepared for zombie apocalypse and lost it all (100k USD invested) in hurricane.

It will never (with exception of all out nuclear war) be total world annihilation. Yet most people seems totally unprepared for stuff that just keeps happening. And it will likely be getting more frequent with climate change.