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Let us know when you figure out that "some other reason." The primary defense against 51% attacks is waiting the amount of block confirmations that make the cost of attacking the block your transaction is in more than the possible rewards. If we all have to worry about people randomly burning money to 51% attack blockchains then the whole premise is bunko anyways.

Here's a hint, randomly attacking the network in a way that loses you money eventually removes you from the playing field. The network is stronger than a motivated attacker, in principle.




I don't need to identify a reason. I simply need to point out that BSV, BTG, and ETC have all suffered 51% attacks already. So someone out there is motivated to perform these attacks.


And if you knew the reason you would understand why, though possible, they are not common on Bitcoin Core.




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