The head of the Swiss National Bank has expressed concern about the inclusion of bitcoin in monetary reserves

Thomas Jordan, chairperson of the Swiss National Bank (SNB), expressed skepticism about the prospect of the SNB buying bitcoin at the central bank's annual shareholder meeting on Friday.
Jordan noted that adding Bitcoin to the Swiss National Bank's reserve assets, which include gold, foreign currencies, bonds, and stocks, could have potential negative effects, such as increased carbon emissions. He then highlighted the energy consumption associated with Bitcoin mining and trading. We haven't decided to invest in Bitcoin yet, and there are actually good reasons for that. Currency reserves are Global Payments. They must be liquid. They must be sustainable, and we must be able to sell and buy them.
Previously, crypto advocates have called for changes to Swiss legislation to allow the inclusion of cryptocurrencies in national currency reserves.