While I do agree that an ETF will help with hedging investments in bitcoin, it doesn't make the price more stable which is necessary for widespread adoption and a subsequent increase in the value. People on wallstreet are not going to invest in bitcoin just because it is packaged as an ETF. For them it would be tantamount to investing in penny stocks since the ETF itself doesnt bulster the underlying value of bitcoin and there is no metric for how bitcoin should be valued.