First, I do not believe that you need to be an expert only have a passion that students can see. As for hot topics: It is important to look at more than marketplace insights alone. I will use my example. I decided to choose a fire topic last year that was listed on the main insights page like these (Apple Keynote) and put the course out quickly but better than the competition. A year later, I am in the highlighted box as Featured, #2 search position, 5 stars, and positive written reviews. I average $3 per month even with some YouTube tutorial promotion. $63 in 11 months. The top end of sales for the high end is $110 today (much lower than when researching) and probably with tons of hours of self-promotion. Lesson learned to do lots of other research to find topics that thousands of students will need to purchase a course to learn or get certified... and beat out a flood of instructors that may also decide to create a course on that Insights suggested topic. There is more to it, but that is a summary of my personal test example. However, I will say that it does look good having created that course for my resume on my tech day job.
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