We can all agree that Satoshi wanted to create the coin that will replace banks and their trust abuse. If he wanted to create the perfect coin, he might have failed.
wrong. you made 2 mistakes here. i have never read anywhere that Satoshi claimed bitcoin is to "replace" anything. and he never claimed to have created a "perfect" coin. these two are your own assumptions.
We, people, buy bitcoins from miners because they are the only ones that can provide us their rewarded bitcoins.
wrong. you buy bitcoin from someone else who has bought bitcoin before you. currently there is 18 million bitcoins in circulation while miners only produce 900 bitcoin per day.
Miners will not afford mining cost EXCEPT if bitcoin price will rise above 50.000$
miners were capable of covering their cost when they were making $0 for mining a block, they were also capable of doing it when they were making ~$50 per block, $200, and finally $15,000 per block. today they are earning nearly $70,000 per block.
you can't possibly make this claim.