Professor Ken Rogoff who proposed the elimination of cash in his...

Professor Ken Rogoff who proposed the elimination of cash in his last book, The Curse of Cash (2016). Here is an interesting article on his thoughts on gold
https://www.gold.org/goldhub/research/gold-investor/gold-investor-february-2019/the-curse-of-cash-and-the-allure-of-gold

12 February, 2019 The curse of cash and the allure of gold In his book The Curse of Cash, leading economist Ken Rogoff suggests that excessive reliance on paper money is responsible for ills ranging from tax evasion to terrorism. He also believes that monetary policy would be more effective in a largely cashless society. Cryptocurrencies are not an effective replacement for paper money, he says, but gold’s role is likely to increase as cash fades from view.