It depends on a few factors:

1. When you bet in regards of (market cap) / (moon level) ratio. The earlier you bet, the more your "Early Adopter Bonus" is. This bonus makes your final bet larger. For instance, now the ratio is 0.96 / 8 = 12%. According to the table 2coins1moon.com/#adopter-bonus-table, this means that your 1 ETH will be converted to 3 GNC.

2. Share of your bet in the final market cap of the coin you bet on. Let's assume that the final market cap (when the moon level is reached) is 10 GNC. Then you get to receive 30% of the jackpot.

3. The size of loser's coin jackpot. So if it's 5 ETH, for instance, then you'll win 1.5 ETH (30% of 5 ETH) plus you get to receive your initial bet (1 ETH) minus the 3.8% comission. But if you own at least one discount token, you don't pay any commission. Also you can increase the size of your bet by owning 2 and more discount tokens (see this table for details: 2coins1moon.com/#insider-bonus-table)