Re: Can't anything be done??
Bitcoins are just a numbered account.
And most bitcoin accepters won't know to block that particular account.
And the holder of that account can generate effectively infinitely many new accounts, break the funds up, redistribute them, and pay from those other accounts in seconds. Although technically traceable to an extent, they would have already received their goods/services by the time anyone can correlate them properly, and the more they break them up, the harder it becomes.
Bitcoins can literally be broken into billions of pieces. And who knows whether someone who receives or acts as an intermediary for any of those pieces are an innocent party (e.g. been paid in Bitcoin and know nothing about the origin of the funds), related to the scam, or the scammer themselves? It could be the scammers setting up a billion laundering accounts, but each one is indistinguishable from an account that someone else has had for years but never used and who happened to get a donation on their website (e.g. I have a button on my website to donate Bitcoin to me in such a fashion, people use it to donate to me for running a gameserver).
And though Bitcoin is "traceable", it's far from easy, and only gives you and enpdoint (i.e. someone paid the ransom into the ransom account, which was ultimately spent in these several billions different pieces at any number of end-points which are places like shops, service accounts, Internet hosts, pastebin, etc.
Even ordinary stores are starting to take Bitcoin now, and vending machines, and places like the Humble Bundles. Though you can say the ultimate destination, and know the path it took, why it took that path and whether that was money laundering or innocent transactions in the interim is impossible to determine.
These guys spent it all without breaking it up much. But that still doesn't help. Sure, pastebin would probably know the associated account and may terminate now that it's in the news, but they aren't obliged to check EVERY origin of EVERY payment they ever receive for EVERY type of currency.