I think his point was that you'd have physical access to it, yknow, to buy physical bread and milk.
What people found out in the Argentinian crisis of 1998 and in the breakup of Yugoslavia in the 1990's, is that you cannot buy anything you want with gold.
People want things that they can use (or must have), so the economy becomes barter - trade alcohol for cans of food, trade cigarette lighters for condoms, gasoline for alcohol.
I kind of doubt there will be a market for trading a can of soup for bitcoins on a street corner. I can imagine that someone might setup a trading warehouse that dealt with bitcoins, but I can't see that becoming standard practice. Keep in mind bitcoin trading requires computers and electricity.
What is gold good for? Gold is good for preserving your savings through bank failures and/or a currency crisis if you convert your savings before the crisis happens.
But you can do the same thing with Swiss francs or American Dollars, but like gold, only if you can get them before hand.
Banks love gold for themselves for that reason - to protect their own money.