See Posts #79 and #99 this thread.
Post 99 has a link to a site with statements like this
If we have worldwide crisis and you can not get food anywhere the first currency of choice will be food or useful things, not gold or silver. If you want gold to keep some kind of value for one day after all is over make sure you are prepped for long, long time crisis before that
First, he's talking about a hypothetical, not a real time and place where gold had no value. Second gold had value even then, although not as much his hypothetically scarce supplies. Third, he has no idea how a crisis will be produced worldwide (e.g. to include Singapore, Switzerland, etc)
Again, my queston is when has there been a time without any demand for gold above trinket value anywhere in the world?