This list might be coming in months/years as Forbes is very positive about the Bitcoin (they accept it as a payment method and even have a reporter in SF living exclusively on Bitcoin for last one year)
They will likely report it when one person is a billionaire due to their investment in bitcoin even if they would not otherwise make the list of being one of the word's most rich people.
There are simply too many millionaires to make it worth reporting when someone makes a million dollars.