
Did John D. Rockefeller know how to be happy? The Standard Oil empire made him one of the most successful and powerful business leaders in American history, bringing him immense wealth and influence. At one point, his fortune was estimated to be $1.4 billion — equivalent to 1.5% of U.S. GDP.
Despite his vast wealth, when asked how much money is enough, he famously replied, “Just a little bit more.”