I try not to let anyone know I have weapons. Seems like they could watch my habits, learn my routine then come in to see if anything is available while I'm out. They could potentially do a lot before the police would show up. Same for the car. If they followed me to the gym or grocery store, work, figure out how long I'm away, they might go searching the vehicle for something under the seat. I had a truck stolen, by 2 guys in a locksmith van. They had no fear. 30 min, they got thru the steering wheel lock, and drove away with my truck.
By the way, I know about the locksmith van and 2 guys, because the shop next to mine saw them 'working' on my truck. My neighbor said they looked very legit, like I had sent them to work on my truck.