The hacker must be a fan of ETH, and it might be easier to convert to ETH for quick liquidation.
The hacker attacked the CETUS protocol, withdrew liquidity to obtain SUI, sold SUI for USDC, and then used USDC to buy ETH.
As of now, the hacker has used 61.47 million USDC and 1.770 SOL (315k$) to purchase 23,244 ETH, at an average price of $2,658.