Alternatively, if things really go that sideways bitcoin will be the only valuable currency in the world.
During the Bosnian War, things that became highly valuable were: bullets, liquor, antibiotics, lighters, and of course food [0]. Bitcoin, or any other currency, was the last thing on anyone’s mind.
[0] - http://www.shtfplan.com/emergency-preparedness/a-survival-q-...