The bottom limit will not be $100, this is only an example. Surveillance and censorship will most certainly start at $1... This is Bank for International Settlements – BIS General Manager Agustín Carstens at a 2020 IMF event. Another clip (and link source) in the first comment below. ???? Watch & share widely. #NoCBDC #CBDC

In the same speech, Carstens also explained how the central banks of a "third (world) country" will be able to forbid individuals to escape hyperinflation or political dictatorship for instance, by blocking their access to foreign currencies. Unfortunately, LinkedIn doesn't allow videos in the comments.