There is a problem in theory. The negative side of a geomantic house is heavy, and it is easy to hide evil and shelter evil, so it is best to put something in the house to increase the yang. Generally, coins are hung on the bedside to ward off evil spirits. Being crushed means those coins are invalid. The coins commonly used to ward off evil spirits are usually ancient coins in the prosperous times. The round square hole of ancient copper coins symbolizes a round place, and the year number of the emperor in the middle symbolizes people. Heaven and earth gather together, so you will see ancient copper coins in general house feng shui and some ceremonies. Ancient money has been circulated for hundreds of years and passed through the hands of unknown people, so it is full of yang and has good exorcism effect. The most commonly used and widely circulated is the five emperors' money in Qing Dynasty.
With coins, you can't find ancient money to replace it temporarily. It works in a short time, but it doesn't work for a long time.