Selling 3313 ETH from addresses held for over 2 years, leaving a profit of $338000

Monitoring data shows that an address that has held Ethereum (ETH) for over 2 years sold 3313 ETH 15 minutes ago, with a current profit of only $338000. The address purchased 6569.27 ETH (with a total value of approximately $11.77 million) at an average price of $1792.1 from September 2023 to February 2024. In August of last year, the overall position had a floating profit of $19.96 million, but no reduction was made. At present, there are about half of the remaining space at this address, close to the cost line.