Update: 10 minutes ago, he has withdrawn all the cost and profit totaling $4.1 million back to the Arbitrum network

So far, he has made a cumulative profit of $9.28 million through three leverages... How did he do it? (scratching my head)

Speculating that he is most likely just a "skilled gambler" rather than an "insider".

now closed the entire position to take profit, earning $2.15 million within 40 minutes.