> if I am renting an apartment, I am SOL

Not at all! If you're renting in a high-rise building, the floors will be concrete below the laminate or hardwood. A good safe will have either 4 holes or 1 center hole in the base to allow you to anchor it to the floor. Use a concrete drill bit to drill a hole in your apartment floor in a discreet area, like in a closet or laundry room. If you can borrow a hammer drill it'll be faster, but even an ordinary drill will work, though slower. Make sure you buy a concrete drill bit.

Then attach the safe using concrete screws and anchors. You can use either a self-tapping concrete screw or, better, put the correct size expanding sleeve into the hole first[1]. Even with a single concrete anchor/screw, the safe will be 100 times more difficult to steal. I've seen expensive TL-15 safes ($5000+) with only one center hole in the base, so I assume the manufacturer thought that was sufficient (if properly anchored).

Before you place the safe, put down a sheet of plastic or a very thin patch of carpet to protect the laminate or hardwood floor. Cut holes in the plastic sheet or carpet for the concrete screws.

When you move out of your rented apartment, fill the holes with putty matching the color of the laminate or hardwood floor. If you make a small effort at patching up, the holes will be invisible.

One more piece of advice: The drilling won't take long, but it'll be very loud. If you have a nosy landlord or superintendent, do the drilling when he's not around. A superintendent, for example, is unlikely to work on a Saturday or Sunday.

Also, cover the safe with a sheet or blanket, so if someone casually looks in your closet or laundry room, the safe won't be noticed.

http://howtospecialist.com/wp-content/uploads/2012/01/How-to...

As sibling point out all is not lost. In a wood framed structure put lag bolts in to studs or beams. It doesnt have to be perfect. Your primary goal is to prevent a strong man, or someone with straps/handtruck, from literally walking off with the goods. The goal of a safe is to simply delay the attacker until an active response arrives.

Edit: in an appartment building check your floor loading. A little jewelry/document safe is probably fine. Big get very heavy very quick on a relatively small surface area.

You think that people are going to be able to steal a safe from an apartment without anyone noticing?