Lol gold does not derive its value from its 10% utility usage globally
try to break up the concept into stages. separate things.
first. what makes gold different from something else scarce like gems, dogs mess of a particular animal, other metals.
UTILITY. this as one separate thing triggers the NEED for it.
then the value. yes you are correct. golds $1.2k PRICE is not based on the 100% utility. infact the speculation of golds utility is only a couple hundred $ of the current $1200 spot price.
this utility speculation is where people see gold and in high need for it the price moves up and low need goes down.
but there is a point at which people give up wanting to sell down. because there is a bottomline support based on the acquisition costs. no one wants to sell at loss. and ofcourse the hype/FOMO can only go so far up too. so the range and volatility of the speculation area is only about $200-300 ontop of the acquisition costs.
so like i said before. imagine instead of say ~$1k to dig for gold. it only cost $1 in your back yard. people would b happy to sell gold right down to just above $1 because thats still profitable sell.
..
that being said.
to even have people wanting to dig for it to such an extent it costs about $1k an ounce of excavator diesel and labour. there needs to be utility to make people NEED it in the first place. otherwise (like crap coins) people would just speculate on dogs mess where the speculation would be from $0-$couple hundred and volatility would allow the price to dip to zero as it has no purpose/function to keep a bottomline support if speculation died
if you honestly thought gold value on the asset spot market was 100% speculation value. then economics is something you need to either take time learning more about or staying away from.
th reason why bitcoin is in the thousands as oppose to hundreds for other coins of near exact same code. is the acquisition costs. which got so high due to the utility. PoW is thousands of $/btc not pennies, because you can do something with bitcoin(there are merchants and services and until recently fee's were acceptable(but losing that edge in future))
at the moment at ~50exahash puts the bottomline support for btc at ~$5k this is the level where most would refuse to sell below as thats where loses begin. the 'value' ontop up to $8k($3k diffrence) is the speculation bit.
but if you take away the transaction utility of bitcoin and make it just a useless locked database of UTXO. no one will want to mine it and say goodbye to a huge chunk of bottomline support. and then watch the speculative element go crazy from $0 to $FOMO and then tank again. thus completely destablising/removing any 'value' store