Thought experiment: what would happen to the price of gold by 2125 AD if nobody born after the year 2025 believed it had value outside of its industrial applications?
See my below comment about 16 Psyche, a 140-miles asteroid made of gold floating out there in the sky. By 2125 AD we'll sure find a way to tow it to our shores.
16 psyche is not made of gold and this reply has nothing to do with my question, in fact, my point would still stand if confidence in gold as a scarce store of value disappeared without any change in supply and it went to ~0 (industrial value)