Damn hard to get the phyz if TSHTF. Or at least that with the right count of protons and shit in it's nucleus. This is especially true of one is racing the herd and/on the lamb.
Bitcoin and physical gold are actually close cousins in that they have no counter-party risk but Bitcoin has some serious advantages in terms of mobility. Associated with the counter-party risk idea, both Bitcoin and gold have the potential for a fair measure of opacity and plausible deniability which can be employed when one party is seeking to understand aspects of another party's stash. People who see their paper-gold, stocks-n-bonds, IRAs, 404-Ks, and very possibly their demand account contents flutter away under the guise of 'social justice' will likely feel the pain of this want greatly.
Bitcoin will do well if infrastructure holds up...which in some respects like freedom of association/communication is a big if. Even given problems here, a fairly technical person will probably be able to use the solution to a reasonable degree. And the world has a fair number of technical people and would have even more if the struggle to preserve assets comes into play. Plus they can hire out. In a true crisis, Bitcoin, after getting the wind knocked out of it would catch it's breath, rally, and finish way ahead of the pack. That would be my guess anyway.