I cant ever see them getting a differant ledger of the ground, do you think that they might run something like a hyperledger as a 2nd layer on top of bitcoin? might be possible in the future.
hyperledger will replace the banks backbone databases.. bank customers wont see/realise it changed, but the bankers will see the changes in their secret systems and how bank customers data is stored, valued and passed around (behind closed doors).
hyperledger wont be an open platform where bank customers can be independant nodes..
or have independant privkeys..
it will all be multisig managed by the banks (imagine it like LN HUB smart contract concept but managed by the bankers)
however the american bank branches for instance would be nodes, of each banks "brand" sidechain.
where the different banks/branches(of thousands of nodes) then link upstream to a collective chain for a national FIAT sidechain... which each national fiat sidechain upstreams again to the IMF SDR (the main hyperledger) top of the pyramid chain.
