Does having a niche limit you or does it focus you?

I believe that you should have a niche and continue to deepen it. Why? Without a niche, you spend all your time pursuing clients, while there’s little or nothing that brings them to you.

But please note: do not necessarily confuse niche with “small.”
For example, people sometimes confuse simple with “trivial.”
Here is how most dictionaries define the word trivial:

Trivial (triv·i·al)
1. Of little significance or value.
2. Ordinary; commonplace.

Just because something is simple, that doesn’t mean it’s trivial.
Just because something is niche, that doesn’t mean it’s small.
Case in point: Miele Coffee Systems.