A lot of people don't realize that in the US at least, there is a semi-secret banking blacklist, where banks will just deny you all services. I know because I managed to get on it, and then managed to get off it, no easy feat. How I got there is another story, but banks are not a friend of the people, and moves towards a cashless society give them even more power, something they already have too much of.
Sidenote: I was in on bitcoin back when you could generate blocks with a CPU... and came to the conclusion that privacy of transaction was too fundamental to a good coin and abandoned bitcoin. Given central banks ability to invent money at scale, I also always thought the 50% attack was something they would work towards... and so that's the story of how I almost became a millionaire.