Should i sell my nikon 55-200 dx lens?

Hi… I'm thinking to sell my nikon nikkor 55-200 dx lens to save some money to buy new lens. I have nikon d3100. The new lens i'm interested on buying is a prime lens or wide angle lens. Is there a lens that can be also prime and wide angle? No right… Am not sure if i should keep my 55-200 lens? Which are good reasons to keep it? What am trying to say is it an important lens that someone has to have in his/her gear? What's your thoughts? Thank you

Added (1). Hi. Please keep in mind that i'm interested in street/urban, interior, architecture photography…
The thing is i'm not really using my 55-200 lens that much. Which lens are ideal fro this kind of photography as mentioned above.

A prime lens just means it's a lens with a single focal length. For example, 28mm, 35mm, 50mm, or 85mm.
There's all sorts of focal lengths, some of which are wide angle. Generally, a prime lens has better optical quality than a zoom lens, due to a simpler optical design and less corner cutting needed. A 55-200 VR (if that's what you have) is one of the best budget Nikon lenses and for that price you can't get anything better. For example, an 85mm f1.8g is sharper than your lens, but it's twice as expensive and only covers the one focal lentgh.

I personally can't say that a Prime lens is a fixed focal length since I own one that is not. What I do say about Prime Lenses is that they hold the same aperture throughout the focal length. Example. 100-300 f/2.8 would be a prime whereas a 100-300 f/2.8-3.5 is not (and the price difference between the two would validate that). I'm not disputing the other viewpoint as it is essentially correct however I do feel that there's more to 'fixed' being the only factor as a prime requirement,… Fast is of particular importance over being fixed in the determination of prime (along with lens quality).

A zoom lens is handy to have in your toolbox but, if you've decided that the only photography you will be specializing in will be landscapes or wide angle, having the zoom may be just extra weight that you don't require.

I'd have to say that, without knowing your needs, it's hard to recommend keeping your 55-200 or not because I haven't been given suitable information to make a recommendation.
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