Why do snakes always appear in the demolition of old houses?

Old houses are generally civil structures, and the environment is not polluted. After a long time, they are relatively humid and more suitable for the living environment of snakes. In addition, rats are easy to appear in civil structures. Snakes eat mice, and mouse nests are also snakes' hiding places. So there are often snakes in old houses. According to our local custom, having snakes in the house is a sign of getting rich. You deserve good luck.