cost of production only has an impact on the market if that commodity is consumed and very depended on continually replenishing the supply.
for things like gold, bitcoin, and fiat cost of production is meaningless, only thing that really matter for these types is total supply + the rate at which the supply grows.
for gold and fiat, the higher their value the higher the rate at which the supply grows, but not bitcoin! and this is one reason why bitcoin is a better store of value than gold. no one can simply change the supply.
sure its hard to "change the supply-side of gold" but its not impossible, asteroid minning is a real possible future for gold. and it wont be the fact that 1 oz of gold only cost 100$ to produce that will bring down its price, the price will change because the total supply and the rate at which that supply grows, has changed.
imagine we mine an asteroid FULL of gold, so much gold we don't know what to do with it, the cost of producing that gold was 100$ an oz, but flooding the market with ALL THAT GOLD would crash gold's price to 5$ an ounce... at that point the supply of gold stops gorwing completely and its more or less forever worthless!
in contrast, if 500 Billion barrels of oil MAGICALLY appeared, the price might go down for a while... but once consumed, the cost of oil goes right back to the cost of production.
lets consider silver.
its cost of production is near 0 because it is a byproduct of copper mines.
but silver still has a bloody high market price.
case and point, production cost has very little impact on "highly durable commodities"
... maybe thats why they
"dont make them how they use to anymore" O_O