According to ChainCatcher, on-chain analyst Ai Yi has monitored that an address (0x737...ca6), which interacted with the Ethereum Foundation 10 years ago, started purchasing 7,318.56 ETH on-chain yesterday at an average price of $3,016.09, with a total value of $22.07 million.
This address sold 12,575 ETH at the peak of Ethereum on August 9 last year, and currently still holds 10,529 ETH.