At 27, John Collison is the world’s youngest self-made billionaire. It’s rumoured to be lonely at the top but luckily Collison has his 29-year-old brother, Patrick – who also counts his wealth in ten digits – to keep him company. The two brothers from a small village in rural Ireland founded Stripe, a company which runs the software behind more than 100,000 businesses. It handles online payments as well as providing a host of other services that help make it simple for firms to run their websites.

Source: www.independent.co.uk