The document discusses several ways to earn passive income from cryptocurrency investments, including flexible savings accounts on Binance that allow users to lend crypto assets and earn interest, BNB vaults that provide benefits from staking BNB including free tokens, and Launchpool which aims to align the incentives of investment funds and communities to work together on projects. Dual investment is also mentioned as a structured product involving two currencies that can provide enhanced returns depending on the performance of the underlying assets.