Plain meaning
Start with the shortest useful explanation before going deeper.
A DeFi protocol on Solana for minting USDH stablecoin against multi-asset collateral including SOL, BTC, ETH, and liquid staking tokens. Hubble pioneered the multi-collateral CDP (Collateralized Debt Position) model on Solana, allowing users to deposit diverse assets into a single vault to borrow USDH at low interest rates while maintaining exposure to their collateral.