Digital asset treasury companies (DATCOs), public companies whose core business is holding cryptoassets, are attracting growing debate. While there is nothing inherently objectionable about a public company investing in cryptoassets, DATCOs pose a number of concerns, including extreme share price volatility and the conversion of financially struggling companies into DATCOs as a rescue strategy. Stock exchanges are addressing these concerns through such means as amending their listing standards and excluding DATCOs from equity indices.