Mr. Sun has finally started buying back ETH:

He withdrew 50 million USDT from Aave 30 minutes ago via address 0x435...7cb, then transferred 45 million of them to Binance and the remaining 5 million bought 1,621 ETH on-chain.

Address: 0x43594da5d6a03b2137a04df5685805c676def7cb