What if, by positioning Bitcoin as a serious investment that is judged along side other investments in companies, real estate, hard commodities, bonds, and so on, that the scrutiny actually diminishes Bitcoin's appeal?
Bitcoin is now having a very strong light shined upon it. In a sense, it's being exposed to daylight for the first time, no longer being in the shadow realm of boutique techie investors like it has been.
What happens when "mainstream" investors find out that Bitcoin isn't really a viable mainstream currency, and that it's really only useful as a meme investment instrument with no inherent value beyond its own name? What happens when they find out that the "decentralized" thing is just a myth, and that, in actual reality, almost nobody uses Bitcoin (or any other cryptos) that way? What if the "serious" investment managers discover that the mythology behind Bitcoin is just... mythology?
What happens, in short, when Bitcoin ventures outside of its tight community of enthusiastic anarcho-libertarians--who desperately want Bitcoin to succeed for geopolitical reasons--and it is instead evaluated, coldly, like any other investment by people who don't have that political agenda?
And what if the first impression of millions of mainstream potential investors in Bitcoin is that it's just a super-volatile asset that only seems to go down in price?
You are making many assumptions about Bitcoin which are not true and then asking us what we think about the eventuality of those false assumptions. A lot of "what if" scenarios. There is absolutely no point in asking such questions because you could claim anything, even something as ludicrous as for example: the entire internet might collapse in a few years due to some mysterious cosmic burst of radiation from some far-away galaxy. What would happen to the value of Bitcoin in such a scenario? Would the Blockhain be lost?
All such questions do is create more FUD. Especially during times when Bitcoin is going down.
So lets stick to what we know to be true. Bitcoin ETFs will not be able to "break" Bitcoin. ETF is a net positive for the value stability of Bitcoin.