Many places have a similar custom of throwing money on the ground, which means to transfer one's own bad things. After throwing things away with money, bad questions are also thrown away. Whoever finds them means that bad things will be passed on to him.
Therefore, the elders at home have always taught that money that falls on the ground cannot be picked up casually. This kind of money is used by others to eliminate disasters, and it is very bad after it is found.