The Liverpool fighter takes on undisputed champion Oleksandr Usyk at Manchester Arena before hanging up his gloves.
Bellew, 35, will take his earnings to around £15m for his last three fights after back-to-back wins over David Haye at heavyweight.
The clash with the unbeaten Ukrainian will generate around £15m thanks to pay-per-view sales and the gate at the venue.
And Bellew has warned Usyk he has to excite on Saturday night if he wants to land an even bigger money-spinner with Anthony Joshua at heavyweight next year.
He said: “He cannot afford to come to England on Saturday and just run away with a boring points win. He has to come here and make a statement.
“He does not get to Anthony Joshua by coming here and scraping past me.
“He has to beat Tony Bellew up. He has to look electric and by looking electric he has to get into the firefight and that is what I wish for.”
Bellew came in at 14st 3lbs during an intense weigh-in on Friday.
Usyk, who weighed in at 14st 2lbs, has his IBF, WBA, WBC and WBO cruiserweight gold on the line in Saturday’s fight.
Bellew has fought across multiple weight divisions during his career.
He boxed his first 23 pro fights at light-heavyweight before becoming the WBC cruiserweight champion, which is nearly two stone heavier.
Bellew’s last two fights were at heavyweight against David Haye and after the winning both bouts, he has returned to cruiserweight division to face Usyk.
Haye, a former British world champion, believes Bellew might have found his ideal weight at this weight-class.
“Since he moved up to cruiserweight his whole career has fallen into place,” Haye said.
“Maybe that’s the weight that he should have always boxed at.”