The Number One way to secure a safe so no one can ever break into it is make sure no one knows you have a safe. Further, for someone to find one in your house you place it in a manner that would take them an hour or more to search for it.
You use a decoy safe - one that can be more easily found - and removed.
The real safe should be hidden in a concrete floor.
“The Number One way to secure a safe so no one can ever break into it is make sure no one knows you have a safe.”
You put in a small safe with nothing of real value in it where it can be found easily and hide the real one with the valuables.