ECB report likens PoW to fossil fuel cars, PoS to electric vehicles vào tháng 7 15, 2022 bitcoin bitcoin investors blockchain crypto-assets ecb ecb released energy sources ethereum financial system mining pow technology proof-of-stake proof-of-work significant trial transition period +
French central bank pilots blockchain-based CBDC for debt market vào tháng 10 19, 2021 adoption banks blockchain bnp paribas bonds cbdc issued cbdc supplied central bank debt market financial markets france ibm listed securities project tested redeeming deals significant trial +