I do not think that will ever happen, because the interests of the current banking system and the principles that gave rise to the cryptocurrencies are absolutely opposite and irreconcilable, so I think that for a long time both financial schemes will continue to march on its own paths, although I think that with the passage of time there might be certain points of encounter and coincidence as there is a growing regulation towards the use of cryptocurrencies.
In any case, the interference of banks in the ecosystem of cryptocurrencies should never be considered as desirable given the merely speculative and immoral interests of the current banking system.
what about ripple? isnt that a mix of both inerests? i dont think their interests are absolutely opposite, both are providing a similar service and banks can profit from cryptocurrencies as xrp shows so why should they be so opposite?