The Ethena airdrop and ecosystem contribute to the growth of DeFi by providing a crypto-native solution for stable money and offering innovative savings instruments like the 'Internet Bond'. By incentivizing user participation through airdrops and rewards, Ethena fosters community engagement and adoption within the DeFi space. This initiative could lead to increased interest in decentralized finance, further decentralization of financial services, and the exploration of new financial models. Ultimately, Ethena's approach could have implications for the future of money and finance by promoting financial inclusivity, transparency, and innovation in the crypto industry.