For reasons of security, I wouldn't leave a gun in my car if the choice was entirely mine, because even if the gun was in a safe, the car could still be stolen and the gun removed from the safe at the thief's leisure. In my workplace, however, not even a licensed gun is permitted--and the penalty is imprisonment. So, I either leave my gun at home--rendering my CHL worthless most of the time--or I leave it in the car. I choose the latter, but am careful where I park (near the staffed exit booth), have nothing on or in the car that says "gun," double-check the windows and door locks, etc. After five years no problems so far. But I'm alert to the risk and keep looking for ways to reduce it without effectively dropping my CHL into the shredder.