That's what Ciphertrace is all about, "trying" to track everything specially Bitcoin addresses. But can they actually do it and uncover the criminal behind those addresses? Could be if criminals don't know how to hide their track. But the problem is that criminals are also above intelligence from the usual crypto enthusiast. It's dark markets, what do you expect criminals are going to used? Fiat? This is just part and parcel of crypto. IMHO.