Only problem is banks are now designing their own blockchains that are closed source and centralised.
This is not going to help Bitcoin or any crypto if the banks go down that path...
Who cares what banks do. I personally never expected banks to use cryptocurrencies and I don't even care about what the whole financial world does with regards to crypto. Let them have their private chains.
The real value will come from things that are not yet mainstream. The financial part is just one layer of the blockchain onion.
Once the technology is more mature nearly every company could benefit from using blockchain tech, and that's where the value will come from.
Give it some time, once people figure out they can prevent cheaters and scammers by using blockchain and do it in a cost effective way this thing will boom, banks or no banks...