Is it bad to pick up dropped money?

Is it ever wrong to pick up money that someone has accidentally dropped? On one hand, it could be seen as a lucky find, a windfall of sorts. But on the other hand, isn't it morally questionable to keep something that doesn't belong to you? What are the potential consequences of keeping found money? Could it lead to legal trouble or damage one's reputation? On the flip side, is there a moral obligation to return the money to its rightful owner? And if so, how can one go about doing that in a world where tracking down the original owner can be a daunting task? It's a complex question that raises many ethical and practical considerations.