Definitely...odd. Now, I can see this being useful if A: You like to be prepared for those "oh s**t" situations whenever you're in bed or idling on the couch, and need that certain bit of firepower, a bug-out bag, emergency/first-aid kit, money to bribe somebody, whatever RIGHT NOW (just make sure you didn't lose the key or safe combination, LOL) and/or B: You just want an additional safe without taking up space elsewhere in the house/apartment to hold a few extra things under lock and key.
But if you're actually trying to hide something? Yeah, come on, thieves are always going to check couches and under beds and such if they have even a moderate amount of intelligence, people always like to throw things in there.