There are plenty other groups of people to market to. ( serve )
If you've been trying to promote "how to make money stuff" and haven't done that well, you can always switch to other markets.
Lots of people started out promoting "how to make money" stuff but then switched and started making good money in other niches.
All decent markets have competition but the "how to make money" market is the only one I can think of where your potential prospects are trying to sell something also.
Do not judge your online business career by what happens to you if you're promoting "how to make money" stuff and be prepared to move on to explore other niches.
Make sure you decide on an net business income model and move forward from there.
Hope This Helps!!