" What kind of currency, then, could be aligned with the living world so that it promoted regenerative investments rather than pursuing endless accumulation? One possibility is a currency bearing demurrage, a small fee incurred for holding money, so that it tends to lose rather than gain in value the longer it is held. The fact that demurrage is an unfamiliar term shows how accustomed we are to the ever-rising financial escalator that we ride – like knowing the idea of ‘up’ but not ‘down’, ‘more’ but not ‘less’. But demurrage is a word worth knowing because it could just feature in the financial future. "

― Kate Raworth , Doughnut Economics: Seven Ways to Think Like a 21st-Century Economist