I'm not sure it will help bitcoin to become an actual currency; what will do for sure is bringing more attention, and that is good. Probably the majority of people who buy the ETF won't care about buying the actual bitcoins but even if a small percentage of those people, let's say 5%, will somehow become more interested about bitcoin then, for me, it's a great result.
i also think like that, even though bitcoin etfs don't have a significant impact on the bitcoin market, at least they can have a positive impact where there might be etf investors who are immediately interested in buying bitcoin because they are curious to try out how to buy bitcoin directly in their wallet. so this etf can be said to be considered a new form of promotion for bitcoin, even though it's not directly like that.