For complete anonymization, they need a little patience.
In the near future, they can buy ZCash.
In the distant future, they can probably move the money into a MimbleWimble based sidechain.
OK, now you're just making up words...
Btw, if you're in Germany, you might still have a chance to get an anonymous prepaid SIM in the next weeks before the carriers adapt to the legal change - you can use that, too.
http://shop.tescomobile.com/pay-monthly/sim-only/Tesco+Mobil...
With roaming in the EU becoming free mid-2017, and Brexit not coming into effect til 2019, the whole EU will still be well covered by anonymous prepaid.
Just like they sent a takedown to every site hosting content from the shadowbreakers, they might just send a SWAT team to every Tor node your data ran through, and try to track you.
And that's in addition to whatever TAO has in their reportoire.
Anyway, they painted a huge target on their back if this is real NSA stuff. I can't see how they would cash-out any significant bitcoin amount ($100k+) without being traced.