Metawin, a crypto casino, has suffered a $4 million hack with funds stolen from its withdrawal system.Hackers moved the stolen funds to HitBTC and KuCoin, with approximately 115 crypto addresses involved.Withdrawals were temporarily halted, but have since been restored for 95% of users.The incident highlights the security weaknesses in the DeFI sector, with a total of $1.7 billion in losses from hacking reported this year.