Well one reason is the fighters do not have exactly as much money as everyone thinks...Though top level guys do have a truck load of it.

The second is many of these guys make the mistake of not being involved in their own finances except for spending it....You have $1,000,000 and owe $250,000 in taxes then go out and spend $1.5 mil on a house and cars you are already in debut.....Even those who have good accountants handling their finances can't be helped if the money is spent faster then it is made.....

Not to mention these guys forget it takes money to keep these things...Happens all the time

Michael Spinks was so scared of ending up like his brother Leon he set up timed accounts....

Once he made a decent amount of money he would live off of that...then he would take his next purse and put it in an account that would keep it locked for 5 or so years...This way if he went broke he had that money to fall back on and it was gaining interest the whole time....

If I am not mistaken he had set these accounts up so he would have one available until he was 55 or 60......