but still the most popular currency for tax evasion, buying drugs and international terrorism funding is USD using citibank and deutche bank infrastructure.
At least, Bitcoin can't be printed and not centralized like a government-controlled money.
Bitcoin is not perfect, also not fully decentralized either, but still much better than more-centralized fiat which are government-controlled and are still used for all the harmful purposes already.
There are plenty of better ways to money launder right now than to use BTC. The classic buying of art work and shell companies are fantastic to evade taxes and clean black money