There was already an attempt to create such a bank, while the attempt failed. There are too many permissions and agreements that are currently unrealistic to obtain (look, for example, on the Libra project - they also cannot get regulatory approvals).
The project was called Polybius (now renamed Osom). The topic in the English section of the forum has been deleted, there is a topic in the Russian locale: https://bitcointalk.org/index.php?topic=1907106.0