But how often do you even make international transfer? You need to pay for day to day things and you dont use bitcoin for that. You also need to take loans you also dont use bitcoin for that. You need some cash which bitcoin is still unable to replace. I am doing Ph. D. in financial law and I focus on bitcoin, but I totally understand that the banks do not care about it. Dont forget that the blockchain technology is available to everyone. Banks can create and they already did their own settlement network based on bitcoin technology.
I'm surprised to see a PhD student mking comments like that. I do a lot of international transactions - at least one a day, as I deal in virtual assets. I don't need a loan, and I would encourage everybody to avoid loans. Debt is slavery, so don't become a slave. Banks are extremely concerned about the crypto currency revolution. as it removes the need for banks if carried to the ultimate. Will it get there? Probably not, but it does introduce a major financial instrument that is outside their control, and they hate that.
Blockchains have been around since at least the 1960s. The Bitcoin revolution was to combine a blockchain with a PoW block generation method, and recording the chain on multiple copies of the ledger stored by a large interlinked peer group. Banks will never create a system like that as they cannot control it.