“Make sure it’s a quality safe. There are tons of videos on youtube of people peeling heavy gun safes with a crowbar and chisel in less than 10 minutes. I’m sure burglars are quite good at this.”
Going through the door is too much work. Unfortunately most safes (even the expensive ones) can be cut open in a few minutes using a $10 angle grinder from Harbor Freight. Peel open a side where the steel is thinnest and pull the guns out. Many people question whether it even make sense to have a safe anymore.
I have several safes from Harbor Freight scattered around the house. They are all electronic with a key. I’ve never had any of them fail.