"[...] The widespread adoption of crypto assets could undermine the effectiveness of monetary policy, circumvent capital flow management measures, and exacerbate fiscal risks. Widespread adoption could also have significant implications for the international monetary system in the longer term."
https://www.imf.org/en/News/Articles/2023/02/23/pr2351-imf-executive-board-discusses-elements-of-effective-policies-for-crypto-assets
