My arrangement is pretty secure. If you want it bad enough, bring a fork lift. The safes are UL listed for cash and jewelry, and push the scale at over five thousand pounds, each, empty. On top of that, UL monitoring 24/7 by a good security firm.
I am also on a very very busy street where cops hang out, and donuts and coffee are sold on my corner. They are staying put I would guess. My only fear would be a Katrina event where my gov knocks on the door, and wants to collect my belongs.