Meaning
A tied cloth sack with a dollar sign printed on the front, like a bag of loot in a cartoon. It represents money, wealth, profit and payday, and by extension anything valuable or lucrative.
It suits payday jokes, savings goals and business wins: “Salary just landed, dinner is on me tonight 💰” Shops use it for discounts and cash-back offers. It can also read as greedy or show-offy if attached to your own earnings too often, and messages pairing it with promises of easy profit are a common sign of scams, so treat those with caution.