One of the most surprising comments this year came from a closed session on fintech where I sat next to someone in policy circles who argued that we should move quickly to a cashless economy so that we could introduce negative rates well below 1% – as they were concerned that Larry Summers' secular stagnation was indeed playing out and we would be stuck with negative rates for a decade in Europe. They felt below (1.5)% depositors would start to hoard notes, leading to yet further complexities for monetary policy.