Gunnar Nelson, a long-time training partner of Conor McGregor, believes that the superstars future may not lie with the UFC.
Nelson and McGregor have been training together since they were 17-years-old and the welterweight believes McGregor's pending boxing match with Floyd Mayweather has thrown the proverbial cat amongst the pigeons.
It makes sense, as McGregor stands to earn an estimated $75 million from the fight – win or lose – while future UFC purses will likely top out around $15 million.
Added to that, McGregor has made no further commitment to the UFC for 2017 as he prepares for the birth of his child and finalises the Mayweather fight.
"You never know what he's going to do next," Nelson said of the Irishman on Submission Radio.
"If he beats Mayweather, I'm not sure that he will ever fight again, to be honest. I don't know, but I could see him just floating off and doing something else crazy.
"I'm basing it on that he wants to go bigger every time. And if he beats Mayweather – like, he's taken the two [UFC] belts, and then he beats Mayweather in this huge superfight – I'm not sure what he's going to see as a next challenge or a next thing that he wants to do.
"I don't really see what he wants to come into the UFC again for. I'm not sure. Obviously there's always something. But he's also having a baby, and I'm not sure where his mind is going to be. He's going to have a ton of money anyway. Maybe he'll do another boxing match or something if it goes well. Maybe he'll get more money there and be more interested in that. I don't know, we'll see I guess. I have no idea."