You are talking about Serial Killers. They are a rarity. The chances of you being attacked in your home by someone like that is very low. Its like getting killed by a plane in the middle of a desert. Its very rare for them to flat out attack a home owner in the middle of the night. Thats more like a movie than real life. It does happen. But those types of people are usually loners, and they pick some type of weak, defenseless targets. Like prostitutes, or women who walk in the middle of the night. You don't sound like a defenseless person. And even if you didn't have a gun. I doubt that they would know. They would probably assume you had one, and find easier pray. Yes possibly some areas should allow gun ownership. But bigger cities and high traffic areas should have strickter laws for buying a gun. Right now all you need to buy a gun is to fill out some background check form, and only 1% of people get denied. And if you don't want to do a background check, you can buy a gun from a gun show. This is all documented to be true. I checked with articles written in 2015 by CNN.