What does it mean for ancient women to sprinkle copper coins on the bedside?

In ancient times, there was a scholar who was very lofty and disgusted when he heard the word "money" said by others. A scholar never says "money". The scholar's wife and daughter want to force the scholar to say "money"

After the scholar went to bed, he sprinkled a lot of copper coins on the bed. The scholar woke up to find the bed full of copper coins and shouted, "Bitch, come on, put the plug away." The wife and daughter are speechless.

"A wall" translated into Chinese means "these". It is also another name for "money" by the ancients.