Multiple Sites Same Niche?

I have been doing rather well in a niche for the past month or so, is it worth my time to make another site in the same niche and try to take more of the traffic? Or should I just find another niche?

If you think you can upsell your users on a similar topic in the same niche then yeah why not, squeeze that niche dry!

If I was dominating a particular niche and felt the opportunity was their to take spots two, three and four as well, I'd jump on it.

You'll only be taking so much of the traffic by ranking first, why not have the other main traffic too. Remember, eventually those that are in the positions below you are going to come gunning for your spot at one point or another. This also doesn't take into account a potential slap from Google, leaving you with nothing if you're only holding one position.

I usually do that, in fact, the niche that is my target now i am creating 10 different websites, i have my main website and 9 little websites where usually i put links to the main website. But i write quality content in the little websites too! For me is working very good...my plan is rank the 10 websites in the top30 of google, i am paying seo services for the main websites, but soon i will pay too for the mini sites!!!!