1. Do you want large institutional financial organisations buying large amounts of bitcoins and then locking it up in centralized trading platforms?
If they keep buying, am sure they can't keep holding, those that have bought in the pass are by now releasing some of their holding, this same organizations too can run loss when the market becomes unfavourable on them and they can't afford to continue holding at a particular time.
They and we are both for profit so no one will buy large amounts of bitcoin and lock it up without doing anything. Furthermore, even without ETFs, we have no way to prevent wealthy people from buying the majority of bitcoin. Bitcoin is for everyone and it is a trading market and buying and selling is always happening as long as you have the money.
2. Do you want Bitcoin to be a commodity or a currency? ETFs will destroy the goal of Bitcoin becoming a currency.
No, but from where you're taking it isn't as how it was, Bitcoin is a decentralized digital currency and there's nothing they can do about it, the whole issue with the bitcoin ETF is not something to mind it be focused on, they are only being dependent on the bitcoin market price and not the network itself.
Even without ETFs, bitcoin would never become a currency. Don't try to blame ETFs for bitcoin's failure to become a currency when even investors like us are turning bitcoin into an investment. We made Bitcoin an investment even before ETFs existed.