Every single type of business currently exists on the internet.
There is no enterprise that cannot increase cash-flow using the net.
Whether you are currently, or planning to, provide a good or service that people pay you for in person, a sales funnel online can generate nearly-unlimited streams of income.
The beautiful part is that costs are peanuts compared to brick and mortar operations, and the reach (customer base) is global.
You're in complete control to choose the size and scope of your efforts.
Part-time, virtually hands-off, couple hours/month additional income? Yes.
Supplement a side gig or real-life part-time income? Yes.
Auto-pilot, find new customers, leads, or just add to top-line revenue? Yes.
Full-blown, quit your job operation that frees and changes your life? Yes.
None of these results are guaranteed, because these results are only bound by your efforts.
People everywhere are waking up to the realization that one can craft their destiny if they so choose, but it requires effort and dedication to knock it out of the park.