With a keen sense of technological gadgets, Marcus Tan found himself at the epicentre of Silicon Valley on an exchange that ignited his passion for tech startups, before co-founding Carousell. Amazon for a smartphone, Carousell is a classified mobile app that makes selling something as simple as taking a picture and buy as easy as sending a text message. With over 144 million listings and a valued net worth of USD $500 million, Carousell is constantly reinventing itself, having recently just rolled out its latest upgrade: CarouPay, allowing users to complete transactions without leaving the app.