Everybody gets beaten eventually, especially when they are a prizefighter like Khabib.
The amount of money these guys get paid is obscene, and it will eventually come to a time when he is paid mega-money to fight an up & coming lion,
No one is invincible in the fight game but unless someone shows that they can be defeated they are invisible, Jon Jones is undefeated other than his disqualification where he was dominating the fight because of a stupid rule and so does Khabib Nurmagomedov and these two fighters have the most impressive undefeated streak in MMA as they are not having padded wins like boxers and right now the UFC fighters are earning a lot of money than any other prize fighters. If you really have a doubt compare the salary they earn in the under card in UFC and boxing and you will understand whether they are getting less pay as they seem to think.
How much do undercard fighters get paid on the UFC? I was under the impression it was a relatively low amount, certainly tiny in comparison to the title card fighters.
I think even Jon Jones and Khabib are not invincible. Right now it doesn't seem like either is really slowing down or likely to get taken down any time soon, but it's extremely rare to see a fighter walk away at the top of the game and leave with an undefeated record intact. Infact, I don't even thing a multi-weight champion has ever walked away unscathed.
Boxing, however, has several such examples... e.g. Mayweather, Joe Calzaghe and of course Rocky Marciano! Are there any similar examples in UFC or MMA in general?