You burn energy when participating in predictions.
Energy is player's entry fee for each prediction question.
All players will start with 10 Energy each day for free. 1 Energy would be replenished to players periodically over a day. Characters have an Ability attribute called "Stamina". The higher the stamina the faster the recovery of energy. Each player is only allowed to possess up to 10 Energy at all times.
Other than daily and periodic replenishment, Energy can only be purchased using WIT.