Question
I'm thinking of starting a blog/magazine around a topic but I don't see many competitors which concerns me.
I want to start an online magazine reviewing products in a niche. When I go on to Google Keyword Planner I see there are 10k-100k searches a month in the area, and opportunities to branch out in similar areas, but I don't see a ton of competitors.
This concerns me that the topic isn't profitable.
How can I know if the topic would be a profitable one?
I don't want to waste years building something only to find that the niche isn't a good one to be in and I should have picked something else.
Answer
I recommend reading "Will It Fly" by Pat Flynn and "The 4-Hour Work Week" by Tim Ferriss.
Go ahead and run a Google Adwords Campaign to a landing page with the option to purchase something related to your topic. If you get a good conversion rate of people who click the Buy button, then it is a winner.
Ideally, you are looking for a topic that is a huge need for your target audience. A friend of mine always says that he is looking for at least an 8 out of 10 on the BIG Problem scale.