OP, I assume you are asking from a point of view that Bitcoin's future "would be better" if it was a medium of exchange first, and a store of value second?
You should remember that it took gold hundreds of years to become a good and stable store value before it became a medium of exchange. I believe Bitcoin will follow the same path and will take as much time as it can too.
You are probably right. But gold has a real existence where cryptocurrency is just a digital currency. In this case I don't think BTC will be able retain store value like gold in future.