What does the fortune teller mean by putting a dollar under the pillow?

It is said that letting money contaminate one's own essence can be psychic and has the effect of calming the qi and calming the nerves.

Divination with copper coins, on the one hand, means that the world is a treasure, on the other hand, because the circulation of coins is contaminated with human fireworks. This means that heaven, earth and people all have three talents, and the results of divination can only be based on such instruments.

Ps: Never sure. .