Passive income with:
Zero risk: FD
Small risk: Blue chip investment
Moderate risk: business
High risk: share market, crypto, currency exchange

Pick your poison.

Running a business is arguably high risk, but I feel still less than trading volatile stocks.
Because it is something you can still manage some of the risk.
So.. that's just the reason I categorise it that way.

Well... I think FD kinda covers that