Are you sure it auto locks? The simplest explanation would be that you forgot to lock it, and it didn’t lock automatically. Maybe your home is close enough to the car that it still senses the key is nearby, so it won’t lock itself?
To answer your specific question, don’t keep anything visible in your car. Thieves usually only target cars that they can see have something inside.
A friend of mine used to live in a high-theft area and drive a “rag-top” convertible that he knew would be easy to cut open with a knife. So, he just left it unlocked, with nothing valuable inside, and nothing bad ever happened. A few times, he came back to find the glove box and center console had been opened. But that was it; the windows were never busted and the car was never damaged.
Are you sure it auto locks? The simplest explanation would be that you forgot to lock it, and it didn’t lock automatically. Maybe your home is close enough to the car that it still senses the key is nearby, so it won’t lock itself?
To answer your specific question, don’t keep anything visible in your car. Thieves usually only target cars that they can see have something inside.
A friend of mine used to live in a high-theft area and drive a “rag-top” convertible that he knew would be easy to cut open with a knife. So, he just left it unlocked, with nothing valuable inside, and nothing bad ever happened. A few times, he came back to find the glove box and center console had been opened. But that was it; the windows were never busted and the car was never damaged.