The largest ETH option block today is: a certain boss bought back a put option of 1800 at the end of March and sold a put and call option of 1900 at the end of June, earning a total of 794000 premium, with 917 ETH per side=> Previously, selling put options in March to close out and take profits, and then extending the sale of options at the end of June, selling both call and put simultaneously to maximize profits, with a profit margin between 1500-2600 at the expiration price. If the spot price expires at 1900, the maximum profit is 26%.