Fantasy World Coin

In a fantasy world, AFK to fight monsters and simulate cryptocurrency trading.

This is an idle game with trading elements.
Heroes, trading, idle gameplay, day-night cycle, and seasonal changes. Your task is to send different heroes (knights, mages, barbarians, etc.) to various dungeons to collect different monster coins (slimes, skeletons, goblins, orcs, etc.). Different monsters appear in different seasons. Then, list these coins on the exchange to sell. Remember, the price of monster coins fluctuates constantly; you can buy low and sell high. It sounds simple, but it's not that easy.
Events. Pay close attention to recent events. Some events may foreshadow a surge or plunge in a certain coin's price.
If you can identify these events, you can avoid losses or even make a fortune!
In a fantasy world filled with monsters, I damaged the emperor's priceless black crystal gem at a gathering. The emperor said I had to pay 1 billion gold coins! Otherwise, it would be a death sentence!
In this world, humans use human gold coins, while different monsters use their own currencies; for example, goblins use goblin coins, and orcs use orc coins. So there are many kinds of currencies in this world. Are they interchangeable? The answer is, of course! I have a plan! I feel like I can pay off this astronomical debt!