Why Do I Want Massive Traffic To My Blog?

I admit the thought of getting a lot of traffic to my blog is nice, but the question I have to ask is this: in the end is it the best thing for my blog?

Now, I am referring to traffic, which is not the same as readers, traffic is something that can be here for an answer, or a person who is simply looking at my blog, whereas my readers are the ones who come back time and again, and often comment.