The DeVos family lost $100 million investing in Theranos. The revelation was made during the trial of Elizabeth Holmes, the founder of Theranos. During the trial, a DeVos family witness, Lisa Peterson, said the family was originally going to invest $50 million but later chose to double it to $100 million after speaking with Holmes.  Holmes, a Stanford University dropout, was 19 when she founded Theranos in 2003 and peddled the company's blood-testing capabilities as revolutionary, claimi...