YES. One of the easiest ways for a burglar to attack and break into any safe is to move it where they can have space to freely use their tools (pry bars, hammer etc...) to get into the safe and the time to try to penetrate the safe. Anchoring the safe to the floor is a very effective way to secure your safe. Even if you feel your safe is hidden you still need to anchor your safe in case it is discovered by a burglar. Remember that being careful and taking extra security precautions will help keep your items secure. Most safes are manufactured with pre-drilled anchor hole(s) and are fairly simple to anchor into concrete. If you have a wood subfloor be cognizant that just installing a wood anchor in your floor will NOT provide adequate security. These anchors can easily be ripped out the wood subfloor by leveraging the weight of the safe. An effective ways to secure a safe to a wood subfloor is to drill holes in your floor and extend long threaded rods down below the floor joist and connect the rods to an angle iron that is four to five feet in length spanning several floor joists and secure the threaded rod to the angle iron and bolt down the safe.