The article is a bit clear but it seems that she was a money mule, not a whale. I'm guessing the houses she bought were for her clients, while she herself merely got a nice salary.
Discussion
* a bit UNclear
Why would a mule be given the whole stack at one time? Why not transfer 5-10 BTC to her at a time? It doesn't make any sense.
Well she's probably a bit more sophisticated than a regular mule, buying London real estate and such requires larger mounts. Though not billions, that's Razzlekhan level shit.