I work in advanced IT in the financial industry. Yes, various banks are currently looking to implement blockchain technology for their benefit - but none are attempting to turn it into a replacement for currency that is based on treasury securities - like BitCoin has attempted.
International banks and central banks would never allow it.
My current customer is looking to crypto currency to replace the Swift settlement system.
“International banks and central banks would never allow it.”
The good thing is that “international and central banks” have as much control over cryptocurrencies as they do over the weather. In other words, zero.