In 2031, a significant portion of the global population will live a financial lifestyle that's free of banknotes and physical cash. But while cashless societies are on the rise, cash isn't going anywhere so soon. How will this dual ecosystem function as more and more governments, tech industries, and even financial institutions move towards reducing physical money? We peek into the future with Matthieu Favas, finance correspondent at The Economist, and discuss the social divide that comes with going cashless, the potential of surveillance states, and the ascension of China in the next 10 years.