Do you not use a locking Wheel Nut, Windows Etchings, O.B Cameras, Steering Locks, or is the Q too hard to answer without the need to be Clever Zac, or is it above your Intelligence.
I buy a bottom-of-the-range +2 years old - I always lock it, and try to avoid leaving it in a potentially vulnerable area. No window etching, no immobiliser, no locking wheel nuts. I never leave anything visible in the car. Never had a car stolen or broken into in over fifty years of driving (I did have a mini lock broken in what I could only assume was a failed attempt).
LOL Humbersloop I also refer to mine as a mobile skip.
I find that having a 998 cc 13 year old micra is enough of a deterrent, as I could easily run after it.