This is disinformation.
Quantum computing CAN wipe out banking security but not blockchain cyber currency. Blockchain security is not based on computing as much as it is a chain of verifications
Decentralized blockchain scares the centralized banks as it should. It is an existential threat to their centralized model.
I have followed centralized banking and blockchain for a long time and in that time I have observed persons associated with large banks take actions to stop blockchain developments and advances. When one gets into the weeds it becomes obvious why banks are so scared, they are at risk of being cut out as middlemen in all electonic transactions.
Agree 100%