Robert F. Kennedy Jr., nephew of former U.S. President John F. Kennedy, speaks to people from a wide spectrum, including coronavirus skeptics, gathered under the Victory Column in the city center to hear speeches during a protest against coronavirus-related restrictions and government policy on August 29, 2020 in Berlin, Germany.Sean Gallup/Getty Images Silicon Valley and Wall Street stars are indulging Robert F. Kennedy Jr.'s presidential campaign. Twitter founder Jack Dorsey, SPAC king Chamath Palihapitiya, and hedge fund legend Bill Ackman have all shown support.