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How do you cash out on this kind of attack if by your own actions you're crashing the value of the coin?


Short it.


Or double spend. E.g. you could send coins to an exchange, cash out, then mine off an old block to get your coins back.


Very true. I still believe this happened in Bitcoin in 2013... When Pieter Wuille and Luke DashJr decided to abandon the v0.8 fork and told the miners to hop on v0.7, they could have easily sold v0.8 coins...




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