Could? It will, if used.
Currently the banks and the services that they offer do not match the year we live in.
It's dated, and they know that. They seem to review the possibilities of having a blockchain which is a good thing.
But they are still delaying the acceptance to milk people as long as possible. The fees banks are taking aren't bad compared to the greed of Western Union and Paypal.
That's the point.
How long will they push the blockchain aside and continue with their old fashion methods for squeezing billions out of our pockets.
They have to deal with share holders, profit targets, etc. They can't afford to use a new technology and instantly lose billions in revenue and profit.
I think it will take at least 5 years before we see any kind of blockchain integration in the financial world.