# Stable Currencies > Stablecoins attempt to peg their market value to some external reference, usually a fiat currency. They are more useful than more-volatile cryptocurrencies as a medium of exchange. Stablecoins may be pegged to a currency like the U.S. dollar or to the price of a commodity such as gold or use an algorithm to control supply. They also maintain reserve assets as collateral or through algorithmic formulas that are supposed to control supply. Token currencies that has direct or indirect pair with stable currency are valuable and highly encouraged for usage on deployed marketplaces. We recommend pairs with stable currencies to automatically identify the value of the token during listing credits purchasing and fulfilling purchase transaction by converting tokens to stable currencies and distributed to beneficiaries who decided to receive stable coins Only authorized account can add stable currencies in the currency manager, as we perform verification check on these crypto currencies. We verify the source, the liquidity and availability of these currencies. We also added to activate or deactivate these currencies if their value becomes unstable under circumstances, from which had happened in the crypto space from time to time. We want to ensure that our community will benefit on the use of these currencies. All stable coins added on the factory contracts can be immediately and easily migrated to any deployed marketplace contracts. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://xircus.gitbook.io/whitepaper/xircus-studio/currency-manager/stable-currencies.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.