Preppers are people who believe the end of the world is coming, and you better be prepared. What exactly is a prepper preparing for? Well, the word ‘prepper’ is a catch-all term. The modern-day prepper might be preparing for a biblical end of days or an economic collapse that results in chaos. Natural disasters such as tsunamis and massive earthquakes are also common prepper fears. And, of course, a terrorist attack is also a prepper favorite.