As there are many corrupt wealthy people around the world, such as politicians and crooks, and they would always try to get rid of their cash in many ways such as money laundering. Since there are many ways to get rid of cash ranging from the obvious to the rather obscure. Has anyone used cryptocurrencies in money laundering schemes?
   
I mean considering the anonymous nature of cryptocurrencies around the world, I think that it would be a good idea to use it to hide your money by converting cash into cryptocurrency which can only be accessed by yourself and anyone who has knowledge of the secret passcode of your ledger.

Is it possible to do so or the authorities have countermeasures in place in order to catch people red-handed when laundering money through cryptocurrencies.