Elizabeth Holmes

Elizabeth Holmes went from the youngest self-made female billionaire to a convicted felon, defrauding investors of $945 million with Theranos' unreliable blood tests. She claimed one test required just a finger prick's blood, but internal data showed 85% of results were inaccurate, endangering patients. Her once-valuated startup collapsed from $9 billion to zero, marking one of tech's fastest bankruptcies. The case exposed how charisma can mask catastrophic failure, cementing her as the ultimate cautionary tale.