[pablovidal85]

Similar to what happened with voice communication, the financial infrastructure will suffer an inversion[1], the banking platforms will run on top of a global value-transfer protocol, instead of the other way around. What you describe at the end of your comment already exists, bitcoin exchanges are using a federated bitcoin sidechain[2] to transfer funds between themselves within their own consensus rules (they could implement reversals or any other feature without having to break the bitcoin consensus).

[1] https://www.youtube.com/watch?v=pKs5JSh3z7A

[2] https://blockstream.com/2015/10/12/introducing-liquid/

[hueving]

An inversion only happens when there is an incentive to do such. IP networks became much cheaper to run reliably and in a scalable fashion.

What problem does bitcoin solve for banks?

[pablovidal85]

It solves exactly the same problem, using a distributed network of peers reduces costs while increasing security and availability.

[hueving]

Is there anything that shows banks have had difficulty with the security or availability of bank-to-bank transactions?

[pablovidal85]

I don't think difficulties are involved here at all, lowering costs generally translates into higher profit, that should be enough to invest in new technology.