348 Emerging risks and new challenges
Central banks could also issue Central Bank Digital Currencies (CBDCs) to
counter SCs (Pster, 2019). However, this could cause diculties for their bank-
ing sector, whose resources would be aected by the substitution of CBDCs for
deposits. Furthermore, it is not certain that this would be an adequate response
to the risk of substitution of the domestic currency by retail GSCs resulting from
a lack of condence in the legal tender or in the national nancial system or from
the inecient functioning of domestic payments systems. Finally, it remains to
be seen what would make a retail GSC successful. If, as Adrian and Mancini-
Grioli (2019) argue, it is the way it ts into an integrated ecosystem prov ...