I just can't wrap my head around "the utility IS as a store of value", it does not make sense to me.
For the sake of analogy, just think on what banks do with gold.
Do they use it to manufacture good electric conductors? Do they manufacture jewelry? No, clearly no.
They simply store it as a "store of value" because it's known that gold doesn't change its properties and it's believed that gold is scarce.
If the banks would sell all the gold staying for no actual use, it may not be any longer such highly valuable.
Now Bitcoin. It clearly doesn't change its properties and it's known for sure it's scarce. So it already becomes something better than gold, exactly for store of value.
The fact it can be also used like a coin makes it even more suitable for the job.
What else it gives value? Its security. Unlike banks that have to pay for heavily guarded storage, you can hide billions on a piece of paper, knowing that the underlying math and the huge mining difficulty makes it a safe asset (as long as you know how to keep safe the information from "that piece of paper").
And same goes with Bitcoin as with gold. The price is high because of the demand. If there will no longer be demand, if whales sell, the price can also fall.
The "digital gold" choice of words is pretty well chosen and tells a lot.