Is this a niche I should pursue?

I have a website set up, it's like 3 years old, looks good, average SEO. Gets like 100-150 views a day.
I have a timed landing page that shows after about 10 seconds in my "get your *inest niche here* page".
I earn about 30-50 dollars a month.

I would like to know where can I start to improve my SEO and earnings for this niche. I don't know if its even a good niche, I just had it run on auto pilot for a couple of years, made me about 500-600$ in total (thats two years so very little).

I…

Is this a niche I should pursue?