Ethena's stablecoin, USDe, has surpassed Sky's Dai in market capitalization, becoming the third-largest stablecoin after Tether and USD Coin. Despite a market cap of less than $6 billion, USDe has gained traction through high yields and strategic partnerships, while DAI's market cap has declined significantly. Ethena's innovative CeDeFi yield strategy combines DeFi and offchain trading, offering users competitive returns but also exposing them to potential risks from offchain entities.