Earlier quoted context omitted.
Why does this floor influence your choice to purchase it over some other commodity to store value (crypto or otherwise?) What do you think that floor even is? (My working assumption right now is gold could lose 99.9% of its value if it was priced based upon it's utility as a metal and not as a culturally agreed upon store of capital.)
I would think that most people buy gold as a safe-haven investment, so in this case its floor and/or non-correlation would be very important.
I think gfodor is asking something more along the lines with "What can you do with gold that you cannot do with anything else you can buy?" There are valid answers to that - gold is a catalyst in several chemical reactions that won't work with any other metal, it's corrosion resistant, it's shiny, it's a very good conductor that's quite malleable. But I'm with him in surmising that if people only used gold for its metallurgical properties, absent any historical sentimental attachment, the price would drop 99.9%. Gold is actually quite abundant; 190kt have been mined so far [1], most of which is either locked up in jewelry or being hoarded as an investment, so if people ceased to believe it was valuable there'd be a very large oversupply for the few real industrial uses.
[1] https://www.gold.org/about-gold/gold-supply/gold-mining/how-...