> You paid a million dollars for it. Does it have any utility for you?
well, you have to ask why somebody might've paid a million for it. For example, if owning the asset means you can charge a toll, then yes, it has utility, and presumably, you've done the sums and found that the utility is equal to, or greater than a million dollars - therefore, you paid for it.
> There are assets that have no utility beyond short-lived novelty or bragging rights
perhaps those bragging rights are useful to those who are doing the bragging. Who are you to say that it isn't utility? Just because from your point of view it is useless, doesn't mean anything.
> The fact that you pay money for something says literally nothing about utility of that something.
and this is where i think we disagree - i am assuming a rational actor. I assume that anyone would only pay money if they feel their spent money gives the equivalent utility, or else they wouldn't have spent it!
Which is why i said fraud is irrelevant in this argument - if you were sold what is meant to be diamonds, but only got glass, then yes, somebody lost utility. But it doesn't mean the original thesis - paying for diamonds - wasn't correct.