Cryptomixers are designed to launder their virtual currency to give them “clean coins” that are tougher for law enforcement agencies to trace. The underlying approach is simple: Mix together bitcoins from different sources to obfuscate their origin, then return the funds – minus a commission – to the customer. Service operators take a cut of every transaction, and the process typically takes time – often days. Some services only support bitcoin, but others will mix newer virtual currencies such as bitcoin cash, ethereum and litecoin.”]
Source: https://www.govinfosecurity.com/money-laundering-cryptomixer-services-market-to-criminals-a-17918