According to ChainCatcher, Lin Chen, head of Asia Pacific business at Deribit, said on a social platform that a user bought a call option at $3,400 at the end of September and sold a call option at $4,400 at the end of September, totaling 2,500 ETH and paying a premium of $738,000. The user bought the bull market spread of $3,400-4,400 in September to reduce costs, and the price would be profitable if it was greater than $3,700 at expiration.