According to @ai_9684xtpa, a whale sold $12.4 million worth of ETH at an average price of $2520 on September 2, avoiding a potential loss of over $730,000. The whale sold despite facing a $105,000 loss at the time, and two days later, repurchased all the ETH at $2376, increasing their holdings by 275 ETH. This move raises questions about whether it was luck or skill.