if the mining cost was $1 they would most certainly mine it instead, and then try to sell at a 2x profit. which would end up having bitcoin value of $1-$2 if everyone done the same
Your reasoning assumes that there is an unlimited number of bitcoins that can be mined, but that is not true.
If the demand for bitcoins is greater than the supply, then the price will rise until the demand equals the supply. If the supply is greater than the demand, then the price will drop until the demand equals the supply. It has no relationship to the cost of mining.
Furthermore, if the price is lower than the cost of mining, then miners that are not making a profit will stop mining. The falling difficulty will cause the cost of mining to drop until it is less than the price. So, the cost of mining is always less than the price in the long run.
when have i ever assumed bitcoin is unlimited number of coins.?? never.
a market price is set by the last order filled.(no matter how many coins are in that order)
that order does not need to be 19million coins and doesnt need a buyer with $798b to set the price.
the last market order setting the price of $42k a coin can do it with just $4.20 buying just 0.0001btc
previous market order before that price of $41.9k a coin could of been just $4.19 buying just 0.0001btc
the market price does not need to sell whole bitcoins or whole circulations for whole btc value in dolar
yes a coin with all the features, uses and utility and security. aswell as a high security cost... AND then being scarce adds more weight to the desire.
but that desire does not come from just being scarce alone.
lets use this example
imagine buyers on 2 separate days just handed their value over. no matter how much coin was available
day 1 $840 1btc- $42k ($42k/btc)
the buyer can only buy 0.02btc and it doesnt fill the order to move the price
day 2 $84 0.001btc- $42.00 ($42k/btc)
0.001btc- $42.10 ($42.1k/btc)
the buyer can only buy 0.00199btc but it does move the price to $42.1k/btc
the demand($) has not increased. infact it has gone down, yet the price has moved up
as you can see its never a supply demand of how many allotments of $42k are fighting against how many allotments of whole btc
a price can move up even if a buyer only has $84 instead of $840 or $42k
..
what you find is that although there are 19m coins in circulation. people with btc are not dumb enough to flood the market. if the amount of $ is low, they make low orders offering lower amounts of sats to keep equilibrium to the market level to avoid mega crashes.
this is why we dont see the 'megawalls' of 1000btc as we did in 2013. because although in 2013 there were only 12mil coins in circulation and now there are 19mill which normally means more coins to sell/offer.. those in the selling position meet the $ amount with fair sat amount to prevent crashes. even when there are more coins in circulation than the previous years.
..
there are more coins in 2021 then there were in 2013.. so scarcity has not yet played a large weight into price discovery. much like a painters paintings are not worth a scarce value while he is alive because he can paint more..
but once a painter dies.. and once bitcoin reaches nearer the 21mill cap.. then scarcity plays a bigger role.
but right now bitcoins value is based on its utility,features, uses and cost of security its utility/features/uses.. with a small % sway in regards to scarity