At 23 years old Jon Jones has a long road ahead of him. Being that he's already made a success of himself in the most popular MMA organization on the planet, he has plenty of time to further establish his dominance.
Jones has never sustained a serious injury in the Octagon. Some call this luck, and some think an injury is inevitable, but at least at his current rate Jones will likely walk away unscathed from most of his matches.
Like well-conditioned wrestlers such as Randy Couture, who is fighting into his mid-forties, and Joe Stevenson, who has more than forty fights on his record, Jones may well be a serious competitor for the next twenty or so years.