I'd argue that investing in skills and training is the best preparation for apocalypse scenarios.

I have a younger sister in medical school, and as I say to her about the debt she's taken on for the degree, "Even if there's a nuclear war and the economy and technology evaporate, people will want to keep you alive for your knowledge. They might break your ankles and chain you up to keep access to your knowledge and skills, but you'll be fed even when almost no one else is."

Not that preparing for an apocalypse is necessarily a great use of time - just saying that skills are a better asset for it than physical goods and resources.