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杨海坡:挖矿本质是一个套利行为。POW挖矿模式的优势是通过这种套利机制,吸引外部的人参与,进而转化为系统本身的用户,达到增强共识的目的,具有一定的扩张性;而POS挖矿只能持有代币的人参与,无法吸引外部人参与,共识就很难扩张,形成内卷。POS虽然在效率方面更优,但共识对于区块链是更重要的。 ​​​​