Ummmm...  our friendly neighborhood currency Bitcoin IS COLLAPSING as we speak.  40% collapse down to $6 in one week?  What next week?  Next month.  I don't think we are in any position to be discussing Bitcoin as a fallback to anything. 

If the economy and financial system shudders that bad, you had better have a shed load of gold bars along with a sharp knife to cut shavings to pay for stuff IMO. .