Can interest and dividends be considered as side income?

As long as there is liquidity, they can be considered side income.

Yes why not? and the best thing is u do not need to "work" for the side income.

It continues to grow even while you're sleeping.

Yes, if you choose wisely

Interest can actually be a pretty sweet side hustle. When you stash your cash in a savings account, you earn interest on the balance, which can add up over time. Plus, if you invest in bonds or use peer-to-peer lending platforms, you can earn even more interest income without lifting a finger. It's like making money while you sleep - how cool is that?