By Rob Lenihan The theft was discovered several days later, raising questions about the vulnerabilities of decentralized finance (DeFi). The cryptocurrency world was rocked after Ronin, the blockchain underlying Axie Infinity, said hackers had stolen roughly $625 million from the play-to-earn online game. Ronin announced the security breach in a blog post, saying 173,600 ethereum and 25.5M USDC had been drained from the Ronin bridge in two transactions. ‘This is Our Top Priority Now.’Bridging is where assets are locked on one blockchain and then replicated on another blockchain. The attacker u…