yes but that gold will always have worth, arguing why gold has value is semantics, in the foreseeable future gold will still be worth the investment, unless you mean global natural disaster in which case we'll have a lot more to worry about than bartering including those that devolve to a state where bartering means "give me what you've got or I'll kill you" in which case having enough food and water to trade doesn't make you wealthy, it makes you a target and eventually a victim.

but if you mean not a global disaster and in fact just a national or local natural disaster (like New Orleans where wealth was a contributing factor to survival) the gold would still hold value... if not locally then just over the horizon which is where help could come for a coin or two and whats more important.... the coins would be in your possession and you could be mobile, whereas cash money would be hard to come by (and worth even less if your banks infrastructure has collapsed) if we were talking about war... then imagine that scene in the movie "fury" when the Americans have moved into a German town ... Germany is at war and on the brink of defeat, all international trade has frozen or ceased the currency is worthless only trade in valuables gets you anything... in the movie "fury" they show one of the main characters (the loader iirc) whacking the shit out of a brick of money from the bank behind him with a baseball bat.... cash all over the ground....worth exactly what it is...paper... good to start a fire if you need to..but not much else.. you used to be able to go to a bank and hand them a thousand dollars cash and walk out with a 1000 dollars worth of gold (the gold standard/gold backed currency) not anymore...