Permissioned chain seems the best choice for entities providing financial services since it's more secure, faster and can be innovated faster as it only requires the “vote” of the attendees or owners of the permissioned blockchain unlike public chain such as bitcoin that needs core change which takes longer and usually results to fork.
I hope Bank of America become one of the partner banks of Formosa Financial in the near future as the company is bridging the gap between traditional banking and crypto banking