The Tournament is a Trivia Rush feature that allows you to earn coins by making it to the top 1,000.
Bear in mind that every time you start a new game, 1,000 coins will be subtracted from your account. If you win, tie or lose, you'll generate points that will add up to help you reach the Top 1,000.
If you are in the top 1000 by the end of the Tournament, you'll win 100,000 coins.