What is Ethena? Airdrop is Coming Soon?What is Ethena? Airdrop is Coming Soon?Ethena Labs, the developer of the Ethereum stablecoin USDe, recently announced the launch of a public mainnet and launched a "Shard activity" to incentivize users. The current annual interest rate of the stablecoin USDe is 27%. How sustainable is Ethena? This article provides an in-depth interpretation of Ethena.