I think they key that people are missing here is, ETF’s are valued in USD. The nominal quantity of BTC held by the ETF is not important. What really matters to the ETF is the inflow of fiat. The value of Bitcoin can simply increase to absorb the fiat inflows without adding more BTC to the ETF’s holdings.
Sure, they need to aquire a substantial amount of BTC, now, but in the future, this buying pressure will subside.
And let’s not forget, these guys are traders. Traders where born to get riggity rekt. They’ve become accustomed to having a safety net of fiat money printing and bailouts. Bitcoin means no bailouts. They will try to use their HFT practices and since, if you take out the 12 biggest green candles of the year, bitcoin steadily trends downward. They’re going to learn a hard lesson.
For us, we need to only worry about not tripping over the schottenfreude. Enjoy the show.