Salvatore Pais, a theoretical physicist known for his work with the US Navy, has several patents related to high-tech devices, some of which bear similarities to reported UFO phenomena. The market seeks to predict whether one of these "UFO" patents, such as the "craft using an inertial mass reduction device," will be publicly demonstrated before 2030.

A demonstration will be considered "public" if it is shown to the general public or covered by a reputable news organization.

https://en.m.wikipedia.org/wiki/Salvatore_Pais