If key financial institutions had more trust in a blockchain than in the Federal Reserve, and the European Central Bank, and the Bank of England, and maybe the Central Bank of Japan to hold an account of their assets.
Do we have any reason to think that would be the case, or they’d enrich the early adopters of one of the existing blockchains by using it rather than creating their own? Central banking doesn’t need to pay the overhead for trustless anonymity since all of the participants are known and have ongoing working relationships.