What Li Yao wanted to do was simple, he would buy a bunch of important resources and then manipulate the price of these items.
Of course, these were not necessities in any immediate sense.
After all, virtual gaming had evolved over many years, and many large vendors and guilds had their own strategies and analysts.
For instance, the Lv. 10 dungeon Evil Cave, not only guilds but also many veteran players had already gathered lots of information on this dungeon.
According to these data, they inferred that items like Shadow Resistance Potions, Night Vision Potions (as some races have poor night vision), and Intermediate Healing Potions were necessities.
There were too many such items to monopolize, and those guilds and merchant guilds which had undertaken such analysis would most certainly have ample reserves. Therefore, these weren't lucrative opportunities.
Of course, making small profits was possible. However, Li Yao wasn't interested in small change.