PANews reported on May 17 that according to Cointelegraph, Ethereum researcher Justin Drake said that the cost of launching a 51% attack on Bitcoin is about $10 billion, which is much lower than the cost of attacking Ethereum. He pointed out that Ethereum's PoS mechanism not only increases the cost of attack, but also provides additional security through the community's social coordination mechanism. Justin Drake emphasized that the Ethereum community can identify and punish attackers, which is an advantage that the PoW mechanism does not have. In addition, Matan Sitbon, founder of Lightblocks, a blockchain interoperability developer, also said that the ultimate security of Ethereum depends not only on cryptography or protocol rules, but also on the community's strong social and economic coordination mechanism.