You stun too easily. I was given an antique Mosler double door safe that I converted to a large gun safe. It weighs 5200#, is roughly 7 ft. tall, 3 1/2 ft. wide and 3 ft. deep (front to back). It sits on four iron wheels. I live in an old farmhouse built in 1875. No concrete slab floors here. I wouldn't want a 5200# safe sitting, on four little iron wheels, on my wood floors even if I could get it through the doors, which I can't. THAT is one reason someone would.
BTW, never had a problem with it or the guns inside it in many years.
SRH
