I often wondered why Bitcoin ATMs are often tabletop sized which makes them easy to steal. Fiat ATMs are so big it needs a bulldozer to steal one. If a man can lift an ATM by himself then it's not big or heavy enough to be secure even if it's bolted down. It's easier to remove a few bolts than get hold of a bulldozer.
Most of the ATM's are screwed to the floor, so there's no way one man could ever move it without use of forklift or some sort of crane anyways, but as always where there's a will,
there's a way, it's just a bit harder. btw you cant just "remove a few bolts" because they're located on the inner side afaik.