I never said "no cash". I keep an reasonable amount on hand, but not an excessive amount. Between my wallet, my wifes wallet, our gear bags, and household drawers and hideaways we keep about $500 available. If I ever have to bug out, I expect that $500 will be enough to get me to some better location that will accept credit cards. If not, then I think the situation will be quite dire and widespread, and people will need to be thinking about bartering with tangible goods rather than hoarding more paper money that won't be worth squat.

Do I think things will likely get to the point where paper money is worthless? No, I don't. Do I think things will get to the point where my credit cards won't work after I bug out from the immediate disaster area, and that banks/etc. won't give me the money I have on deposit? No, to that question too. But if that bad situation ever does develope and I run out of my $500 of paper money, I'll put my faith in tangible goods to trade, not larger heaps of stockpiled paper money.