You know what, I am afraid that Mike has agreed to that fight only for the sake of money.
It's clear and certain. if a boxer who is old and has retired for a long time but wants to get in the ring again, his main goal is definitely money. high pay will not be missed just like that, what's more if the position is in financial financial difficulties, you definitely want and want to fight boxing in the ring again.
Don't get afraid with Mike he's fine he's a legend so for sure he's still capable to do what he used to do before in boxing ring. Did you see his latest training? If not you should check this
https://www.facebook.com/share/v/3xiBCqP4enBdLHNT/?mibextid=oFDknk I also though he's old already and fighting Jake Paul is kinda risky for him. But if you watch that clip you can see that Tyson is in good condition and its like he never age and can able to dominate his opponent. I'm afraid to watch on what will happen to Jake Paul after watching that clip since Tyson still have that speed and power that's why I expect that he could able to win against Jake Paul in this match.