lol Isn't Randy like 32? I'd probably kill myself if I got fired from something I've been apart of for most of my life (He's a third generation superstar, just to make yall remember). But he's done pretty much everything there is to do in this business. I feel like the only thing he can do when he comes back is to just put over people. But damn, he's like 32, so what else could he do if he does get fired? He still has a REALLY long way before he retires.
He can try becoming a movie star. As you said, he's done it all as a wrestler and much like Cena, he can retire now and move on to try his hands at something new. He's gotten paid plenty, is a 9 time World Champ, former Intercontinental champion, Royal Rumble winner, main evented Wrestlemania (lukewarm match but still) and has a lot of great matches throughout the years that are 'must watch'. (vs Foley, Benoit, Undertaker, Christian etc) A Hall of Fame career if you ask me.
Besides, the sooner he ends his career, the better off he'll be. The concussion issue is nothing to just sweep under the rug and Orton seems a lot like Benoit, in that his head is sensitive to taking bumps. I'm not all that worried about Orton, he'll not get fired because he'll never get a third suspension.