Bitcoin's most significant use case, until merchant acceptance grows sufficiently, is as a long term investment. "Saving" is the wrong expression, but hey, economics isn't Lagarde's strongest discipline
Not saying Bitcoin shouldn't be used for commerce, I entirely encourage that, merchant acceptance has never been as goo as it is now, and isn't slowing down. But investment is Bitcoin's number 1 purpose, facts are facts.
Yes, Bitcoin is not so much a store of value as a means of speculation at the moment. And smart contract cryptos like Ether and Cardano are valued based on the potential they hold, not for anything they have done so far.