In a scenario where dollar collapses to zero you would benefit more from owning a gun, ammo & food than bitcoins.
That's for sure. Are you a prepper? ^^
I think that's true if all fiat crashes. If it's 'just' the USD, then the people might use other fiat. If all fiat crashes, we're doomed. Move to the nearest farm and be sure you've got enough guns & ammo. And some protecting gear. Maybe landmines will be usefull then.
I hope we won't experience such situation ever.