He will but give him time and don't rush him. He's been in a cage for nearly ten years. he doesnt know any different and is very afraid of whats out there. so if he does comes out on his own make it a good experience for him and don't frightening him so then next time he wont be afraid to come out again. maybe you could leave his favorite treats or toys hanging outside near the cage to encourage him to come out. make sure your on your own in the room with him because he might be too nervous to come out with to many people around. Best of luck