Which crypto narrative is hardest to verify independently?

Some claims are frustrating but ultimately verifiable with publicly available data or straightforward checks. Others, however, are framed in a way that sounds compelling or technically impressive yet are extremely difficult to assess without access to internal systems, proprietary metrics, or detailed operational transparency.

The combination of AI and crypto stands out in this regard; it is relatively easy to confirm surface-level indicators like on-chain activity or operator payouts, but far harder to determine whether the underlying compute is producing meaningful or valuable outcomes. Which narrative category do you think currently presents the largest gap between what is claimed and what can actually be verified?