have you heard about money laundering using bitcoin?there's so much news i read in my timeline about that. but i think using Bitcoin will reduce corruption because using cash to money laundering is better than using bitcoin. the reason is unless you're a suspect already and the notes are marked, cash is untraceable. This is perhaps one of the reasons (smart) government agencies are happy about Bitcoin, Bitcoin creates an illusion of anonymity and privacy , but a sufficiently determined attacker (like the NSA) can eventually trace Bitcoin transactions back to an IP address. 
Well, I have heard about it but not in a high level it is happening, just like you said that money laundering using the bitcoin, may be in my country, it is not happening. But i know that in coming time, people use bitcoin for money laundering. But i heard some politicians are using bitcoin and other crypto currencies becasue of save their black money.