One of Bitcoin's major strengths is that it is open access. Its inevitable that banks, financial firms, etc. will get involved.
You can't stop people you don't agree with from using Bitcoin however they choose; if you could, it wouldn't be Bitcoin. I don't like the magical derivatives tracking some index price thingy not actually Bitcoin ETF mumbo jumbo, either...
But Bitcoin will survive this, and continue being Bitcoin. It will continue being the most secure, open access, decentralized, neutral, censorship resistant network in existence.