The primary use case for Numeraire is as a potential reward mechanism for data scientists who participate in the Numerai tournament. The more accurate their machine learning models are in predicting stock market movements, the more NMR tokens they may receive. This encourages data scientists to continually improve their models and contribute to the platform. Additionally, the NMR token can be staked by participants in the tournament, indicating their confidence in their models. If their models perform well, they retain their stake and may receive additional rewards. If their models perform poorly, their staked NMR tokens are burned.