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It sad to say this but it seems Satoshi was very idealistic to believe miners will never act against their own profit ...
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A common misconception is that Satoshi's theory of "honest nodes" remains
applicable and consistent in all possible situations. The reality is that it only
applied to the very specific situation outlined in the Whitepaper. We are well
beyond those things now. The 1MB Cap was Satoshi's acceptance that he did
not solve the "Proof of Node" (1CPU=1Vote) puzzle. PoW+Blockchain was not
the final answer.
"Miners always seeking profit that is not against their interests" is always
based upon the specific circumstance that they are in (whether known or
unknown to others) and at what stage of Bitcoin evolution the community
is in, at the time (whether ignorant or well educated). The system can be
destroyed due to human ignorance, it does not need to be a willful attack.
The assumption is that miners are not dumb greed, but just greedy. But it is
not greed alone as some like to think, but needs an "educated greed". If the
miner's become "dumb", ego driven, or attackers, they will ignore this game
theory aspect because their specific individual circumstance has changed. If
the "honest node" theory was correct, this aspect of miners "NOT SEEKING
profit outside their interests and the networks interests" would not exist.
BCH (SHA256) is a form of proof, that the miners have proven Satoshi's original
whitepaper theory partly wrong. So, when they proclaim they are following the
"original vision", they are actually disproving Satoshi ironically, and will cause
the ecosystem to go into a state of failure, which should harm them the most.
The reality is that Satoshi wasn't really idealistic, he was just fallible and while
solving larger issues, he overlooked minor ones that have larger consequences
over time. He was obsessed with solving one question, which obviously created
new ones that weren't asked yet.
The truth is that "honest nodes" can never exist in human systems, because
the problem is not the technology or the system/network itself, but the human's
inability to not seriously maim or destroy something that is functioning adequately.
With humans there is a constant push to do more, or find more, or acquire more,
or expand more, and that aspect is what Satoshi failed to capture and contain with
PoW+Blockchain+Token. There is still something missing IMO.