The mainstream driver is going to be some form of 'disaster'. it can be as mild as 1970s style inflation or a 2008 style crash. It can be as severe as a long-ailing Brazilian Cruzeiro or 1998 Russian debt crisis. (People will bring up Germany or Austria after WWII but that really was a unique situation with reparations, occupation, and bad decision making).

Prepping makes sense to the mainstream once they experience a disaster. And those disasters are being manufactured even now by mis-management of debt.