"no money" is on the verge of bankruptcy, that's why he is back in the ring
When he is no longer able to physically fight, he will become broke, not like if you or me went broke but he will not have the mansions or the cars, he'll just live off his past fame, a slightly upper-middle class life style. He'll never be completly broke in the age of reality tv.
Wouldn't be the first professional athlete to go broke either; Holyfield, Tyson, Douglas, Bowe, Toney, Briggs.... f*ck it, almost every boxer goes broke and more than half all pro athletes in the NFL, NBA, and MLB file for bankruptcy (there was an SI article about it, google that junks, very interesting). Color doesn't really play a factor, it's the socio-economic level and education level prior to becoming rich is what plays the biggest factor. No Money is not very educated and has very bad role models in his life (crackhead dad and uncle just to start) so he never learned and will never learn how to manage money. He will be broke.