There are no banks who accept bitcoin, but with the majority of banks you can withdraw money to an exchange and buy bitcoin.
I use kraken and when i want to buy bitcoins i just iniatiate a SEPA transfer and voila i can buy bitcoin.
Banks are not related when in terms of cryptocurrency. And for sure they hate it, that's why bitcoin was termed as decentralized. Maybe banks are not accepting bitcoin or any cryptocurrency but there are online shops or maybe stalls that accept it in other counties like in Overstock.com, Newegg.com and others.