Napkin math tells me that over 50 tons of gold have been used just in iPhones over the past 13 years. Just like any commodity - if there is demand, there is probably value.
190,000 tons of gold mined in the history of the world vs. 700,000,000 tons of copper.
you didn't list utility. You listed physical properties.
Utility is how those physical properties help/hinder the use of said material for a purpose.
The utility of gold, when society is broken, will be minimal. Except as a barter currency, as it's widely recognized.
However, under such a circumstance, i would say other goods are better - such as food staples, guns and bullets, and a shelter you can defend (like a bunker).