The safe is just to delay them, and make them "work" to get them out. Mine isn't anything all that special, but it's in the corner, bolted to the wall with a lot of bolts.
I have cameras set up with motion detection that call my cell phone when any movement or loud noise is detected. My safe is in my spare bedroom, no person alive would be able to get inside without my knowing about it. They have to pass by 2 cameras to get to my safe. I have a UPS on both my PC setup and the cameras and they can run a fair amount of time without any power and just the power failing will trigger the motion detection, turn on a couple of LED emergency lights, and call my phone and record a video clip to "the cloud". I can set off a siren remotely if I want to. I work a few minutes from home and the local PD arrives very quickly most of the time, so I'm not too concerned.
About 10 years ago, I had just installed an older camera setup that was web accessible. It was very unreliable, but it did work the one time I needed it. About a month after it was installed, my phone went off and when I saw the name of the camera show up on the caller ID, I knew it was either someone was in the house, or one of my dogs had passed by the camera, which was very rare, but did happen. In this case, it was someone in the house, a friend of mines' little brother, who has a history of being an amazingly smart guy who does amazingly stupid things. I watched and recorded him stealing 12 guns I had in boxes in my former "Gun Room". I didn't have the safe space for all of them. I was already in my car, heading for home before he left. I called his brother and sent him a little chunk of video and told him if his brother brought back my guns, I wouldn't go to the police. I had them back in less than 2 hours. His brother had borrowed his car, and copied the key to my house that had my initials on it, without his brother thinking about it happening, as I have known the younger brother since he could barely walk. I never thought he would steal from me. When I saw him, he apologized, etc, and I told him if he did anything to me or my property again, he would be going to jail. His brother upgraded my locks for free and made a new key for himself, and hid it where it would be very difficult to find. Only his wife and him know about it, and them I trust.
Where is the little brother now? Federal Prison, doing about 10 years for a bunch of stuff. He will be about 50 when he gets out. I'm glad his parents aren't around to know what became of the "surprise baby" they had almost 20 years after the first two.