Ethereum, Bitcoin and other blockchains are being called the future of money. This decentralized, digital money aims to replace physical cash and middlemen like VISA or your bank. But is this really such a new idea? We travelled to the remote Pacific island of Yap, where an ancient form of stone money has more in common with the future than you’d think. The Future of Money is part of What Happens Next, a series of deeply reported short documentaries that examine aspects of life poised to transform radically in the next decades. We’ve spent two years traveling the world to find the people who aren’t simply making predictions about the future, but are already living them out.