As noted, by putting in a safe you are merely hoping to make it easier for the thieves to steal from someone else.
While my little safe is not hidden {bottom of the closet}, it is thoroughly bolted down. Could a bad guy get it open or out? With time, tools and a lot of "want to", perhaps but most thieves are opportunists who just want to snatch, grab and go. We usually use it to store cash, electronics, prescription drugs and weapons as they are all far more secure inside the safe.
Another benefit is when traveling through a state that does not recognize my concealed weapons permit. Unloaded and securely locked in the safe possession is completely legal but very {as in 20 seconds}, accessible.
:C