Banks are not bullish on crypto, Banks are regulated by the governments & non-government currencies such as Bitcoin, Ethereum, XRP etc are threat to their power. Since crypotocurrency market is showing huge growths despite some ups & down, seeing this tremendous growths banks are changing their stance because they came to understand they can not stop or control digital currencies. That is why they are coming up with the centralized stable coin which can be easily regulated, monitored & pegged to fiat currency. That is why governments stopped further development of Facebooks Libra project & due to increased scrutiny from government regulators some of Libras partners such as Visa, eBay, MasterCard and PayPal abandoned the project.