A speculative store of value that everyone has coordinated upon is utility, and this has little to do with the quality of the underlying technology. The fact remains that I can pay merchants of varying degreees of shadiness in BTC much easier than I can send them a wire transfer. Now, you might not think this is good for the world, but it certainly is utility.

To be fair that argument could be made about any speculative asset. Art, classic cars, watches, etc. With btc currently the barrier to entry is lower. I can buy some satohis for a few bucks in hopes that they appreciate in value. I cant buy a piece of a Picasso or a Rolex. It is a speculative investment much like those, just one that has a wider audience.