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Digital assets and currencies

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Michael McCullough (entrepreneur)

Michael McCullough is an American investor in healthcare and life science companies, social entrepreneur, and emergency room doctor. He was a Rhodes Scholar. He lives in Palo Alto, California.

Trading basics

Steve Feinberg

Stephen Andrew Feinberg (born March 29, 1960) is an American billionaire businessman and government official who has served as the 36th United States deputy secretary of defense since 2025. He is the co-founder and former chief executive officer (CEO) of Cerberus Capital Management. Feinberg was also chair of the President's Intelligence Advisory Board from 2018 to 2021, during the first