It's unfortunate but when some athletes achieve fame and money at a very early age it goes straight to their head and they think they can do no wrong. He is a pathetic figure who is throwing his career and a good deal of his life away because he cannot control himself. It is ironic because it takes a great deal of discipline to train as hard as he does yet he shows no discipline in his personal life. Again most of this can be attributed to becoming larger than life at a very early age.
I think he certainly is the greatest MMA fighter who ever stepped into a cage or ring anywhere. But in the long-run like a chain we are only as strong as our weakest link.
It will now be a race to see if he matures faster than he ages. If he does we will see him fight many more times. If he doesn't then it is one more kid with money and fame who found out too late that without maturity and discipline you have nothing in the end.