What does it mean for a token to be useful? The best heuristic is whether people want to hold it for some reason other than as an investment. For example, some tokens grant access to blockchain-based products or services, similar to how baseball tickets grant access to a game. Other tokens coordinate human decision-making, as with governance tokens, or incentivize human work, as with base layer infrastructure tokens. And even other tokens memorialize contributions to a system, whether it be data or something else valuable (but that isn’t an investment).
