Prediction contestants have created markets to wager on whether Bitcoin's price will exceed $30,000 at the end of 2023. The contest rules and details can be found on Astral Codex Ten, with the market resolution ultimately decided by Scott Alexander's judgment. Some platforms reserve the authority for Scott Alexander alone, while others note that predictions on their site won't influence his evaluation. The outcome will be determined based on future posts from Scott Alexander, providing a clear point of reference for the markets. Participants can only improve their track record through successful predictions on these platforms.