Elon Musk, Marc Andreessen and Cathie Wood have spent the past few days on Twitter exchanging ideas about how investing and financial markets work — all in the name of liberating small-fry investors from elite giants that manage and peddle index funds.

Former Treasury Secretary Steven Mnuchin’s new investment fund is flush, courtesy of some of the same Middle Eastern countries he courted closely when he was one of the most powerful U.S. financial regulators.

Henry Hill, the mobster whose exploits animated a bestseller (“Wiseguy”) and an Oscar-winning film (“Goodfellas”), once made a splash working with gamblers to rig college basketball games in the late 1970s.