i am about to start working on a niche site and the keyword for the site has about 87,900 results in google. i would love to write about it but do you think it's worth it considering the number of search results? thanks!
Well... yes, it would be worth it, hopefully the monthly search queries will be regular to impressive. Would you care to divulge the niche so we can assist you in your endeavor? Other wise you can just stop at my "Well... yes" part and leave it at that. You did post that comment looking for some assistance, right?
For me having that number of search results will be a medium to high volume of competition. Ranking your website high for that keyword will give your website a very good traffic.