Tyson Fury says Anthony Joshua and Deontay Wilder are his only possible opponents once he has dealt with Wladimir Klitschko for a second time.
Eddie Hearn this week predicted Fury-Joshua could happen before the end of 2016 in the wake of Joshua's IBF title success against Charles Martin.
Fury was unimpressed with that second-round stoppage and has vowed never again to fight for the IBF belt after the organisation stripped him in December just weeks after a stunning points success against Klitschko.
But the lineal heavyweight champion, who still holds the WBO and WBA versions, admits money is his motivation and says the prospect of giving his unborn grandchildren a secure future could see him step in the ring with the unbeaten Olympic champion.
"The biggest fights are [WBC champion] Deontay Wilder and Anthony Joshua," he told Sky Sports News HQ. "There's only those two fights that could generate that money.
"I've already secured my future. If I never box again I don't have to work again until I die - 100 years or whatever - so I'm just securing grandkids and their kids now.
"I've already beaten the best man there is and was, so I have no motivation. Whoever they put in front of me I'll fight, but they've got nothing that I want. Only money - they're going to give me money to do it, so I'll do it."
One fight remains off limits no matter the cash rewards on offer - a grudge match with David Haye, who twice in the past pulled out injured with a date set for the pair to meet.
"If they offered me £200m to fight that man with no name I wouldn't fight him," Fury said.
Fury branded Joshua's weekend performance "slow and ponderous" in the immediate aftermath of the fight and renewed his criticism at a Wednesday press conference when he called the new champ "a pumped-up weightlifter".
But he later told SSNHQ: "You can't take anything away from Anthony. He did a great job, he knocked his man out, that's it. He won a version of the belt, end of."
Fury's rematch with the younger Klitschko is scheduled for July 9 in Manchester, although he says there are no guarantees it will even go ahead.
"I'm going to do some training and see how I feel after a few weeks," he said. "If I feel good I'll carry on, if not I'll just call it off.
"If you look at the interviews after the [first] fight I said I didn't know if I'd continue. Obviously I'm continuing, I want to keep fighting, but my goals have been achieved so what I'm doing now is basically fighting for money."