Poly Network was hacked again, and the cross-chain bridge completely took the top three spots in the DeFi hacker attack list. Why again? Because on August 11, 2021, the Poly Network mainnet was hacked: a total of $610 million of users' assets on the three blockchains of BNB Chain, Ethereum, and Polygon were transferred... Although the specific amount of the theft has not yet been calculated, the total amount is likely to exceed the $624 million loss caused by the Ronin theft accident, ranking first on the DeFi hacker attack list. This also means that the cross-chain bridge project has taken the top three spots in the DeFi world hacker attack, and is far ahead of other stolen projects in terms of amount. The cross-chain bridge has truly become a hacker's cash machine...