Could you please elaborate on the current landscape of banks that are actively engaged in developing and implementing Central Bank Digital Currencies (CBDCs)? Are there any specific banks that are leading the way in this field? Could you provide some examples of banks that have already launched or are currently piloting CBDC projects? Additionally, are there any regions or countries where banks are particularly active in exploring CBDC solutions? Lastly, what are the potential benefits and challenges associated with banks adopting CBDC?