The banks hates crypto, to them, it like a big competitor that needs eliminating. So its obvious that banks doesn't like bitcoin because they are going to lose potential profits from it.All Bitcoin holders and users knew about this long before. However, banks also are politicians and official's allies. Banks are afraid of Bitcoin because they will lost a lot of investors and banking investment.
With bitcoin, peoples dont use banks to open account and make transaction. When we opening wallet, its like we have account in the banks and we dont need third party like banks. Bitcoin creating transparant ledger and bitcoin not controlled by anyone or institution thats why many central banks oppose bitcoin.