Crypto-assets are a digital representation of value or rights which may be transferred and stored electronically, using distributed ledger technology or similar technology (e.g. blockhain). They are neither issued nor guaranteed by a central bank or public authority, and can be used as a means of exchange and/or for investment purposes and/or to access a good or service. A wide range of crypto-assets exist, encompassing different features and functions, hence presenting different challenges and risks.