The difference between Gold values:
Objective value: rare heavy metal, non-corrosive. No inherent use
.
Subjective value: can be used in jewelry(if one likes gold jewelry), in dentistry(if one likes gold teeth) and in electronics(copper is actually a better conductor, gold is used due corrosion resistance(and there are alternatives being developed to eliminate use of gold)
https://phys.org/news/2010-10-alternative-gold-electrical-applications.html