"Money's" history has largely been one of property. It was gold, it was silver, it was in general immutable, you could warp it, stamp it, it was inherently worth whatever it was. The mark of the coin, provided sovereign trust that the "money" was the quantity and purity that you would expect.
This moved largely to a representation of something of value. Which would work so long as the banker or sovereign would create the right quantity of representation. This resulted in bubbles and bank runs when it wasn't done right. But it was essentiality tied to this immutable stuff. A gold standard. This has historically always failed...
Today money is the creation of debt. The commodity becomes the work that is created in society, and that debt is paid in money. Which then is used to create economy. This separates money from property, and it becomes more responsible for simply economy, the swirl of debt. The big key is that bankers and politicians are kept separate. The bankers attempt to keep it right as that is where the long term value is for them, and if they get it wrong, if it falls apart, the bankers have essentially nothing, and nothing is happening. The politicians through the power of central power get to impose a very special attribute to money. It can, and has to be accepted, for all debts public and private. This is a very important distinction that separates modern money from property based money. The value store in property based money is intrinsic. The value store in modern money becomes a balance of supply to work or debt. One of the big problems of this is when pooling becomes supra-economic and becomes a source of political power. This was severely limited before, it was extremely difficult for an individual to become this rich. It is much easier in this system. As it happens the economically powerful persuade for themselves to pool more of the wealth so that they have more power. Interestingly enough, this helps prevent inflation, and maybe actually keep the economy running, but it skews political power. This was supposed to be solved by confiscatory means of the government which then simply destroys the money as a fulfillment of self debt. But, this is precisely what the eco-political class works to overcome.
Bitcoin, is more akin to commodity. It has no special governmental blessing, protection, or edict. It can't be forced to be used for paying of debt. However, the value of it isn't intrinsic, for it isn't a thing. It is attributes of a thing. It is a tulip bulb. This allows for specialized movement and tracking, but it really isn't money. However, if wealth is created in the process, then it looks like money for a wealth tracking agency of a government, and it looks like wealth when converted back into money, no matter how many steps. If the process of conversion from money, into assets or economy, and then back into money for the purpose of obscuring the source and path of the original money, THAT is money laundering. And if the scheme tends to have that as an inherent purpose, the scheme itself can be declared illegal. This has happened a lot with insurance, banking, strip clubs, car washes. You see a ton of it sensationalized in the Sopranos. A very important place where this has been enforced, but received a lot of different views, though clear in the charging and investigation papers, was online poker. The money laundering claim doesn't require bit coin to be money. And if the entire scheme seems to be largely leverageable for laundering, and little other purpose it can be shut down for that reason. If the scheme is largely used to defraud regular unsuspecting public in can be shut down, not just for theft, but the scheme itself. Barry Madoff, Fulltilt, AB/UB are current examples. Bitcoin and crypto currency of sorts may very well find that same fate.