There have been a couple of posts referring to the trend toward a "cashless" society. Ok, more than a couple.
The article gives you a serious look at consequences and examples in other countries;
https://survivalblog.com/guest-article-the-tyranny-of-a-cashless-society-coming/If the politics is offensive to you, please just skip over those parts... Be aware that it could come back to bite you in the future...
As a prepper, this is just part of being "situationally aware". In plain language: keep your eyes and ears open.