You can hide your money, and then you can launder your money. I don't know much about bitcoin and about money laundering to know if it would make it any easier, or even harder. I do know, however, that if it makes it any easier, the big fat cats will make good use of it. But maybe there's no difference, I don't know. Maybe somebody chimes in?

This book's author claims it is the third largest business(money laundering): http://www.amazon.com/The-Laundrymen-Laundering-Largest-Busi...