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The stakeholders of bitcoin don't want miners to do that. If miners do that, the stakeholders (the people who are paying for the miners to mine) would change the rules. For example, they'd change the mining algorithm. That would turn the miners expensive ASICs into space heaters (a little faster). Don't miners have way to much power in the current system? ...


Simple question really, considering theres a very small group of miners controlling the chain ATM. Miners are distributed around the world, many of them may join the same mining pool to even out the variance in payouts though. Do not confuse the number of mining pools for the number of miners. Really, it is not possible to know the number of distinct mining ...


What you are describing is a majority attack which a miner own more than 51% of the hashing power, it has happened once in 2014 but the miner then decided to lower its power to allow the bitcoin to work as intended, you should also notice that the things a miner owning this power can do is limited, see this answer:

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