Isn't that basically what bitcoin is?
We can hardly buy anything with it. We just give it value for the sake of giving it value.
Matter of fact, let's do just that for the heck of it, see how far we can go with it. I'll pick up a rock and call it Akorn and put it up for $10. I'll buy it back for $10 and let's see how much it'd be worth by the end of the year.
bitcoin is far more than just a rock. We have so many rocks lying around but we don't have bitcoin being given away for free or we can't find it lying around.
Even if we somehow magically give the rocks a value, where would you store so many rocks ? In your backyard ? But what if you don't have a backyard ?
Also, if your rocks somehow has a value, the government will dive in claiming it is government's property and then will regulate it.
You will have to get the rocks from the government and then later use it for trading products.
Whereas bitcoin cannot be controlled by the government and is be stored on the blockchain.
But yeah the fiat money used to transact with bitcoin is still regulated in many countries since it is controlled by the government.
Now do you know why bitcoin is simply not just a rock ?