Crypto can be an income-generating asset just like any stock that pays dividends. You can use lending protocols or act as a liquidity provider and, in many cases, have your income earned in a stable coin (such as USDC).
Hilariously, crypto has reinvented fractional reserve banking. "Staking" is just traditional fixed-duration lending, but with some weird caveats and liquidation rules borrowed from margin trading that you need to read carefully.
Most importantly, it has no real guarantee. There is no reason why our beloved Tether inc can't just vanish from its Cayman Islands headquarters one day