The article describes how Airtm allows its users to easily invest in BLEND, a decentralized finance (DeFi) protocol that generates interest by lending cryptocurrencies. The initial investment is in USDC (with plans to add more currencies) and offers the flexibility to withdraw capital and accumulated profits at any time, without a mandatory lock-up period. To participate, an Airtm account must be verified and a minimum of 5 USDC is required, assuming the risks associated with smart contract failures, price oracle issues, and the general volatility of cryptocurrencies.