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ah I see, you would need the ASIC miners to perform the attack, not just nodes. I am not sure why that went over my head.
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You need 51% of the hash rate
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I see. When it comes to BCH, is it more vulnerable to this kind of attack because of the increased block size? Does it require better hardware with the larger block size?
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I don't pay attention to BCH, but this may provide insight:
https://decrypt.co/49819/bitcoin-cash-rebels-launch-51-attack-to-destroy-bch-hard-fork
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Check out the cost of running a 51% attack(50% ain't good enough), not to mention the "killing the golden goose"issue: as they spend the money, bitcoin's price would plummet. Makes no economic sense.