«اِلْكَدَّابْ خَرَبْ بِيتِ الطَّمَّاعْ»

A deceiver finds his easiest target in someone hungry for gain. He dresses up a scheme with promises of profit, and the greedy person, eager to believe, trusts him. That person then pours money into ventures that never pay back, until savings are drained and the household and its fortune are ruined.

As a general truth rather than an account of one event, the saying puts the blame on both sides. The liar does the damage, but greed is what lets him in. Someone content with what they have is harder to fool, while appetite for more makes a person believe whatever flatters that hope.

Use it when someone loses money by trusting a smooth talker who promised easy profit. It fits warnings before a doubtful investment, or comments afterward that the victim's own greed made the deception work. It can sound blunt toward the person who was cheated.