Inherent Unpredictability: I believe that the further we try to predict into the future, the more unpredictable and uncertain outcomes become, making it pure speculation rather than useful information.

Opportunity Cost: The resources, time, and attention spent on decade-plus prediction markets could be better utilized in shorter-term markets, which might offer more direct insights, actionable data, and clearer return on investment.

Potential for Misleading Information: Long-term prediction markets might attract more speculative and less-informed participants. There's a risk that these markets could perpetuate misconceptions or biases about the future.

Changing Variables Over Time: Over a span of a decade or more, countless unforeseen events, technological advancements, and policy changes can occur. These can drastically alter the trajectory of a prediction.