In D&D there’s a monster called a mimic which camouflages itself as a treasure chest, but then it’s a big mouth inside and it eats you. What would this be in real life? I think it’s your phone.
The longer a world has been around, the more civilizations have left important valuable information, magical objects, and treasure chests. In the limit, all creatures tend to be shaped like treasure chests as a survival and predation strategy.