The financial regulations are pretty complicated and can be interpreted or retroactively changed as guys in your government want. Especially in US. There are al

The financial regulations are pretty complicated and can be interpreted or retroactively changed as guys in your government want. Especially in US. There are already "anti-hidden compartment laws": http://www.aei-ideas.org/2013/11/america-heres-your-war-on-drugs-a-felony-drug-arrest-in-ohio-for-not-trafficking-drugs/#mbl http://www.aei-ideas.org/2013/11/america-heres-your-war-on-d... So if you want to hide your bitcoin traces, it's better to make them completely diffused in the rest of the blockchain history to avoid attracting any extra eyes.