I love the idea of having enough money to not worry about money
Does the worry ever really go away? There is always someone trying to take your money. While I don't know the life of the ultra-rich, I suspect that they have even more people trying to take their money than us average Joes. Perhaps with their resources they can hire a money manager to alleviate some of the worry, but then they have to worry if said manager will disappear into the night with their money; something that becomes increasingly attractive and worth the risk when the sums become large.