What are your thoughts on having a single weapon that you're proficient with vs owning multiple that you rotate out on a regular basis?

I currently own a full size pistol (XD Mod 2 in a .45ACP) and I've been thinking about possibly getting something a bit smaller for ease of concealment. However, the saying "fear the man who only owns one gun, because you know he knows how to use it" comes to mind.What are your thoughts? via /r/CCW http://ift.tt/2lAvGjk