Jack Dorsey: Twitter squared

Jack Dorsey founded a social media behemoth, but made more cash from card payments. He built Twitter, but was removed as CEO, before going on to found fintech firm Square.

BBC business editor Simon Jack and journalist Zing Tsjeng uncover Dorsey’s unusual billionaire biography. He was a kid with a speech impediment who created a website that changed the way the world communicated. Despite being a brilliant coder, he nearly left the tech industry twice. He first retrained as a massage therapist, and then as a dressmaker.

Good Bad Billionaire is the podcast that explores the lives of the super-rich and famous, tracking their wealth, philanthropy, business ethics, and success. There are leaders who made their money in Silicon Valley, on Wall Street and in high street fashion. From iconic celebrities and CEOs to titans of technology, the podcast unravels tales of fortune, power, economics, ambition and moral responsibility. Simon and Zing put their subjects to the test with a playful, totally unscientific scorecard — then hand the verdict over to you: are they good, bad, or simply billionaires? Here's how to contact the team: email goodbadbillionaire@bbc.com or send a text or WhatsApp to +1 (917) 686-1176. Find out more about the show and read our privacy notice at www.bbcworldservice.com/goodbadbillionaire.