I saw a televised interview with the CEO of BAC last night our time and he said he and other banks would be interested in crypto if it became a medium of exchange for customers.
The interviewer went back at him a few times trying to get him to say otherwise and he reiterated if it became a medium of exchange for customers.
I believe this is the "for the record" view of all mainstream US banks, however you may be correct @moXJO as their job is to stay ahead of everyone else and the published view may be quite different from what they actually plan to do. They could well be trading BTC or your info is more up to date than mine.