hey why not? it worked for Mt.Gox right?
honestly, the banks wouldn't touch it if they didn't KNOW (not think) they could game the system. I imagine private blockchains that are not public ledgers here. it just saves them money. dont think their fees will go lower either.
It's about optimization.Lowering the own costs and customers still having to pay the same fees means more profits for the banks.
Some settlement and clearing houses will get cut out and be left behind.
When progress happens some old ones always have to die or disappear.