I agree that Bitcoin demand must stem from utility rather than its potential for price growth for true adoption. That has always been the end game, which is why everyone is racing towards a solution for scaling and why it's such a hot topic within the community. That being said, if it could be used for both, why shouldn't it?

It's currently widely used as a store of value because it's pretty much perfect for the role as it currently is. It's easy to store, it's easy to transfer, it's easy to secure, it's liquid, it's immune from local economic instability, and it has a ridiculously high return potential. It's hard to blame people for using it as such.

On the other hand, its utility as a payment system is still flawed from its lack of scalability to its volatility and less than ideal user experience. Its utility isn't being ignored just because; its utility is being ignored because there are numerous other options that are (subjectively) better and easier to use. Once this area improves, which it will, I'm sure more people will be using it. People tend to forget that Bitcoin is essentially still in its infancy and still has a lot of room for improvements.