Working under George Soros, Druckenmiller helped guide the strategy that "broke the bank of England," making them more than a billion dollars in 1992 by shorting the British pound, leading to its crash. However, that trade wasn't a fluke. After starting Duquesne Capital Management in 1981, Druckenmiller's hedge fund never had a down year, a period that included the Black Monday crash, the dot-com bust, and the great financial crisis. Duquesne Capital Management averaged an annual return of 30% from 1986 to 2010, crushing the broad market. Druckenmiller closed his fund in 2010, but he didn't stop investing.