Because could bitcoin represents a value reserve or acts as a "digital gold", really could it change the world in a deterministic sense?
Bitcoin is more than a way to store value.
Right now it is so because there are not any real use cases for it in our real gold, thus people hodl bitcoin and wait for it to become mainstream. Its feature may change in the future as the usage of it changes through time.
indeed a small part of bitcoin functions like that, but bitcoin can still develop again in the future even more so with the very limited number of bitcoin supplies that will make the price of bitcoin more expensive in the future.