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As Stonehedge says, there are questions to ask about his business acumen. There's also a lot of so far undiscovered country (well, except for those who've been there) about his links to organised crime.
I wasn't talking about his business life so much, though, more about his personal life, of which we now know more following all the revelations of recent years, including his niece's book.
For a desperate loser with a loser complex, he still has a lot of money. Amazing how unfair the world is.