Billionaire Investor Stanley Druckenmiller is among the best investors of all time. During the fourth quarter, Druckenmiller swapped some of his holdings in the "Magnificent Seven" for other stocks in the elite group.

You can say many things about former hedge fund manager Stanley Druckenmiller, including that he is a billionaire, investor, and philanthropist. Druckenmiller has a long history of market success, and with an estimated net worth of around $6.

Warren Buffett once told shareholders,  “The worst sort of business is one that grows rapidly, requires significant capital to engender the growth, and then earns little or no money. Think airlines.” He continued,