Asian casinos were supposedly used to launder the huge 81 million dollar theft from the Bangladesh central bank a few years back, too.
Bitcoin makes what easier? laundering money? Laundering money is making illegal funds legal or appear legal. While bitcoin can add some anonymity and some extra layering it doesn't do the primary function which is to wash the funds.
If we went to 100% VAT taxes, money could be laundered in the... oh wait, there wouldn't be any reason to launder money to avoid taxes, might not want to flash it around of course...