Central bank digital currencies (CBDC) are currently a hot topic. A study by the Bank for International Settlements (BIS) from January 2020 shows that 80% of worldwide central banks are engaged in CBDC-related research (Boar et al. 2020, p. 3). The percentage of central banks that run experiments or proofs-of-concept is also growing, reaching almost 50%. 10% of the surveyed central banks plan to introduce a generally available (retail) CBDC in the next three years and 20% in the next six years (ibid., p. 7). Therefore, CBDC efforts are very dynamic and are expected to even increase in momentum within the next few years.