McGregor is weighing up his next move after being beaten by Floyd Mayweather in his debut boxing bout last August, with a possible rematch, a UFC return and both moves into WWE and Hollywood all serious options for the Irishman.
"The guy's got a f--ing $100 million", White said, adding, "And fighting is the worst".
But the Irishman, who captured the UFC lightweight championship in that November 2016 win over Alvarez, has yet to defend his world title, and White says it's unclear if the desire is there to return after his monumental payday against Mayweather.
In recent months, White had said publicly he hoped for McGregor to return in Las Vegas, either at UFC 219 on December 30 or UFC 222 on March 3.
White admitted on Tuesday McGregor has done so well and has made so much money there might not be any motivation left. I've got guys who made less than that who are lawyers and went to school their whole lives and quit working. If this were true, I just have to believe it would be off-the-charts insane.
Sam Allardyce: Former England manager is again under consideration for Everton job
The Toffees will look to pick up a vital victory tomorrow night when they welcome West Ham to Goodison Park. Everton have failed in an attempt to hire Paulo Fonseca as the English Premier League club's new manager.
The UFC chief fears the star may even never fight again. And I think in the next 24-48 hours, I believe that An Garda Síochána will be approaching Conor McGregor and saying to him, 'By the way, we just want to officially inform you that potentially your safety is at risk'. It's the most McGregor has been paid for a fight in his career.
"He's got a new nutritionist and is having way less problems with his weight now, he is in the 170s now". "But if Conor walks away and doesn't ever want to fight again, it's part of the game". "Money changes everything with a lot of people".
With McGregor out of the picture earlier this year, Ferguson won the interim belt by defeating fellow contender Kevin Lee at UFC 216 in October, then demanded that the Dubliner "defend or vacate" his undisputed crown.
"Conor is a rich kid who is a god in Ireland. When you make that kind of money, you're that famous and you're a professional athlete, you're gonna have an overload of cling-ons".
"Ferguson has no business to talk about anything", White stated.
The Daily Mail reported that police are "aware" of an incident that was said to have taken place in Crumlin. We're working on a new deal with him. "If it's true, we'll get it figured out and we'll go from there".