Banks are very well regulated by governments and they must obey central bank laws and guidelines, I believe the lack of clear laws on bitcoin and exchanges is at the root of barclays decision of the not to provide their services to coinbase. I read this news:
Controversial UK Party Becomes Nations First to Reveal Crypto Policywe can already imagine that dark times are coming in the uk
But banks constantly disobey the laws and take money from their customers. They end up paying a small fine relative they stole and they continue to do the same predatory practices. Don't trust laws and regulations when the people making the laws are bribed by bankers.