Who will be the first Manifold Officewarming attendee to be crowned the Manifold Monarch, or Manarch?

The party guest with the highest position on the leaderboard of this group will be crowned the Manifold Monarch, or Manarch, to be admired and adored by all attendees.

The Manarch must be addressed as "Your High Profitability" at all times. The Manarch may demand that party attendees make predictions on any market or engage in prediction-related challenges. If the Manarch creates a market, all party attendees must trade on that market at least once. The Manarch has absolute power over the box of Manifold shirts. The Manarch has the authority to banish or pardon any guest from the party for any length of time.

This market resolves to the top trader in the Manifold Officewarming group at 6:00 p.m. on April 5.

Credits to @CarsonGale for the idea!