Is none, none exist in the world. Didn't you get the memo? No such niche's for making money with adsense.
It is also possible people are out there blogging in their lovely well-paying niche sites and won't be rushing to tell you what they are. My advice would be to a) go for something you're actually interested in otherwise the blog is going to become a pain in the butt and b) something that hopefully is topical to at least a significant section of a society somewhere.
if you're fun of writing articles on religion, then you can do it. I am actually earning from that topic.
That is so true. Don't try an MFA blog, it never works, and you'll soon run out of content. Think about it. Say, you discover that "coins of medieval england" is a high paying keyword about a niche, and you decide to create a whole blog about it. Now, unless you know loads of stuff about these coins, you're going to find it really tough to a) get traffic b) keep visitors coming back. So, yeah, make a blog on something you're interested in.
your niche is the subject you know the most, the more you know about a subject ppl will think you're an expert and will start visiting your blog. So as long as you know more than your readers, readers will come.
I tried bogging on the subjects of my "sites" but the effort wasn't worth it as i would have been better off adding new content and pages to the sites themselves. What HAS worked is a "general" blog - I just write every day about whatever happens to take my fancy. This way I get lots of (hopefully) interesting pages and lots of visitors. Another advantage of trying this method is that its means your blog is what blogs were intended to be:- 1. A Diary & 2. FUN Any money I make I just view as a nice little extra for the effort. Don't forget it takes 10 minutes to write a new page in a blog but that page might last forever