Purifying coins (+18 bc can trigger violence related traumas)

Sooo my friend that i taught i ching says that you don't need to always purify with Yang energy, like with sage sunlight or moonlight, she says that i can purify them with yin energy too

Like burying to soil, to give a specific example that she gave is bl00d

What are ur thoughts about this topic?

She says that my fortunes are too optimistic so I can try purifying with yin energy but idk it seems a little twisted