Marshall Mathers is the 7th richest artist in hip-hop (net worth of 110 million). The richest artist would be P-Diddy with over 350 million.
250 million in bonds and savings
2million $ maybe..
His career prize money is approximately $55 million USD. Coupled with endorsements, etc, it's a reasonable estimate that his worth is in the $100-175 million dollar range, quite possibly more.
500 mill