@ForestNanoo @CaptainCrypto33 Attacking PoW requires capital expenditure (acquiring miners) and operating expenditure (running the miners). Attacking PoS only requires CapEx. The OpEx part is what makes attack costly to perform.
Look up nothing at stake problem.
@Forestnano@CaptainCrypto33攻击PoW需要资本支出（收购矿工）和运营支出（运营矿工）。攻击PoS只需要资本支出。OpEx部分是攻击成本高昂的原因。
查一查没有任何利害关系的问题。