BTC itself is central bank, BTC is money!
Banks are naturally afraid of competition, which will bring new competition to financial markets and replace some of the Banks' businesses!
Less banking means less profit!
Right. Being in crypto, we are our own bank. So its obvious that banks doesn't like bitcoin because they are going to lose potential profits from it. Imagine people not going into the usual route when moving money around. That's billions of dollars getting out of their hands.
So to eliminate competition, they will attack it. They are waging wars against bitcoin now and I think it will be a continuing battle. But bitcoin will not eliminate banks, and it has no intention to do in the future.
Of course that's the game of the business the banks seen already that bitcoin is possible rival in their business, cryptocurrency can provide their own wallet it means less clients for the bank. Digital currency can manipulate its transaction by not doing the normal bank procedure. Banking business still needed for fiat transactions that's their advantage.