Aethel Labs is proposing to add Solana (SOL) as collateral for its USDe treasury. If approved, the initial position in SOL would be between $100 million to $200 million, representing around 5-10% of SOL's open interest. The synthetic stablecoin USDe uses a hedged cash-and-carry trade strategy that uses large futures positions collateralized by other stablecoins to maintain its peg of $1. Aethel is also looking at using liquid staking tokens (LSTs) such as BNSOL and bbSOL as collateral. LSTs are tokens that represent staked assets, such as SOL, and can be traded on exchanges. This would allow Aethel to earn yield on its SOL collateral while still maintaining its exposure to the asset. The addition of SOL as collateral would be a significant development for USDe. It would increase the number of assets that can be used to collateralize the stablecoin, making it more resilient to market volatility. It would also make USDe more attractive to users who hold SOL, as they could now use their SOL to mint USDe. The proposal is currently under review by the Aethel community. If approved, it would be implemented in the coming weeks.