3. 1 Trade Volatility

Fair reward for one's own efforts
The value of in-game money Jewel may fluctuate. For simple examples, the price of food may slightly increase during Winter, while the price of ice increase during Summer. Such natural causes change the value of the assets.
In the game, the value may fluctuate depending on factors related to the operation of the content, such as seasonal event, character rarity, and time limit for ticket purchase. Rare characters can become very expensive over time, and items with a time limit on their use will quickly depreciate.