no, why?
The scumbags will not think twice to cause £10k's damage (and the associated down time!) to grab whatever it is they're after.
My bro leaves his MX-5 unlocked (with nothing in it) in his driveway because he's already had one roof slashed by idiots after the $5 of cash in the ashtray.
The principle is the same, but only you can figure out whether it makes sense in your situation.
A