I don't believe the "control" fear, at least not in a democratic nation though I would not like to speak for the Russian and Chinas and Saudi Arabias of the world.
To a large extent we are at least half-way there, with a lot of people not using cash because they seem too think it not necessary, or at least limiting their cash use to small purchases, donations and the like.
What I do see as the real problem is the huge rise in unofficial "cryptocurrencies" that don't appear to have any real-world use but are traded in themselves. Rather than heading them off by a sort of competition these unofficial, bogus currencies should be shut down, world-wide. It would help the fight against climate-change and greedy demands on public electricity supplies too, because the servers dedicated to them are probably the largest single users of electricity devised, but for no constructive purpose.
