Nobody who understands the first three sentences of the bitcoin white paper wants a Bitcoin ETF.
A BTC ETF unwinds the solution to the double spending problem.
"A purely peer-to-peer version of electronic cash would allow online payments to be sent directly from one party to another without going through a financial institution. Digital signatures provide part of the solution, but the main benefits are lost if a trusted third party is still required to prevent double-spending. We propose a solution to the double-spending problem using a peer-to-peer network."