I know about 100 people who made a moderate to serious attempt at passive income, and the hardest part is finding something people will pay for. I can categoriz

I know about 100 people who made a moderate to serious attempt at passive income, and the hardest part is finding something people will pay for. I can categorize them all into a few buckets: 1. Got industry experience through freelancing, and used that to find something valuable 2. Worked on their "passive income" project fulltime for > 6 months 3. Both, or 4. Made less than minimum wage Now, anecdotes aren't data, and most of these people aren't software engineers. But I would encourage you to try taking your product ideas, freelancing in that industry with small contracts, and using that to refine your sense of what the market wants.