Everything in this world is transient and none should feel proud of his possessions which are bound to perish. True God alone shall abide forever. Karun could be a very rich man so named after the historical Croesus, king of Lydia, 5605-46 BC, known for his fabulous wealth.
References :
1. Kohli, Surinder Singh, A Critical Study of Adi Granth. Delhi, 1961