Why does everyone are into this ETF when it won't really affect the bitcoin's market price. If ever it will be approved the holder/company who has the ETF bitcoin will surely get the upperhand. Of course it will help citizens from the use who are not applicable to buy or invest on bitcoin will have the chance to get it as a stock but not as a currency like anybody does here.
There are ETFs that hold bitcoins. More demand means they have to buy more of them to hold for customers. Those ETFs would have a direct effect on the market.