All money is arbitrarily valued as are stocks and so on.
We gold was used, an excess of it caused rising prices too. Bi-Metalism, gold and silver, was yin and yang and ever changing too.
A medium of exchange is what money is and nothing else.
Digital forms of exchange are nothing different and open to more evil.
The lesson is that life is volatile and so is money, prices, commodities, stocks, bonds - emotions drive the volatility