My wife coined a word that needs to become part of the English lexicon.
Apocochondria: Noun. An irrational fear of the apocalypse. Symptoms of apocochondria include stockpiling dry goods, ammunition, and firearms. Apocochondriacs are mostly harmless, and prepared in ways that are useful, but they live so focused on a fearsome future that they cannot control, that they often lose control of themselves in the process.