The internet love to rib on billionaires, but there are some who are genuine. Like Charles Feeney, who made billions from running Duty Free during the golden age of air travel. He secretly donated much of his wealth and his worth was only revealed during a legal battle when had to disclose his finances. Right now, Charles’ net worth is said to be now in millions since he donated much of his wealth. If I remember correctly, I think he always lived in a rented apartment too. But I think the type of billionaire like Charles Feeney qis far and wide among the group.