More than 260,000 low-grade Primordial Crystals, on average contributed over fifty thousand each.
The wealth of someone in the Rule Integration Realm indeed correlates positively with their cultivation, unless encountering special circumstances such as a breakthrough in martial arts or the need to purchase some precious treasures.
Otherwise, in this world where mighty power belongs to oneself, the stronger one is, the more wealth they will possess.
Compared to Meng Ji's approximate thirty thousand low-grade Primordial Crystals, Lou Yu, who had mastered several fragments of rules—even upwards of twenty—was truly wealthier.
Moreover, Lou Yu, with five such pieces, was still in an upward trend with a considerable distance from his lifespan limit, so he wouldn't think about using low-grade Primordial Crystals to buy any life-extending elixirs.
As for the precious treasures related to lifespan, none were cheap; Meng Ji and a few others had likely spent a lot of money on this.