Dana White says Conor McGregor may never fight again as negotiations over the UFC star's return to the octagon drag on.
McGregor, the first man to simultaneously hold titles in two UFC weight divisions, took a break from the sport to contest a money-spinning boxing match with Floyd Mayweather Jr in August.
Although he lost, the Irishman earned a bumper payday from the bout in Las Vegas, leaving White struggling to convince the 29-year-old to return to mixed martial arts.
"We were working on a fight for him at the end of the year, and he's just not ready," White was quoted as saying by ESPN.
"We're still in that 'Conor might never fight again' [phase]. The guy's got a f****** $100 million. I've got guys who have made less than that, who were lawyers their whole lives and quit working... And fighting is the worst. Try to get up and get punched in the face for a living when you've got $100 million in the bank.
McGregor hit the headlines for the wrong reasons earlier this month, when he entered the octagon and confronted referee Marc Goddard at a fight in Dublin.
"Conor is a rich kid, who is a god in Ireland," White said of his latest transgression.
"That's not the healthiest environment."
As for McGregor's long-term UFC future, the sport's boss added: "At the end of the day, I'm going to run this business with or without anybody.
"If Conor wants to fight again, we absolutely want Conor to come back. But if Conor walks away and doesn't fight again, it's part of the game.
"We need to figure that out. Right now, with him, it's not about defend or vacate. We're working on a new deal with him. We've got to work out this new deal."