In Part III, Michael tells Anthony that he should finish his law degree, even though he hates law and wants to be an opera singer instead, because "If you have a law degree, you're taking out insurance." If the Corleones were a typical family financially, that would make sense. But they most certainly are not--as is dramatically demonstrated when Mary gives Archbishop Gilday a check for $100 million "...for the poor of Sicily, in the name of Vito Corleone." So why should Anthony worry about financial "insurance" when the family is so fabulously wealthy? He'll inherit much of Michael's wealth when Michael dies anyway.