Of course total surveillance of state is main concern. Unfortunately WEF propose and EU make slow steps to limit cash as possible. Ie by advantages and bonuses in case of paying by card. Banks limiting cash withdraw amount...
https://www.consilium.europa.eu/en/press/press-releases/2022...
Interesting documentary about one digital currency and digital ID, State of control (2022): https://player.vimeo.com/video/769876604
Czech senate recently refused to make cash as constitutional righ.
https://www.epochtimes.cz/2023/02/15/navrh-zahrnout-do-ustav...