I haven't watched the documentary (I didn't even know it existed until now), but that case is recycled every year with the same question - "is she alive?"
There are theories that she was killed by the mafia, that she changed her appearance with plastic surgery, and that she lives in a luxury resort far beyond the reach of all possible authorities. Regardless of whether they will ever catch her or not, I think that in addition to her, the money also disappeared, and that those who were so naive as to believe in such fairy tales will get nothing but an expensive life lesson.
It never occurred to me to invest in something like that, because in those years 1 BTC was worth between $200 and $400, which was really cheap and most people could afford to buy at least one and save it all these years.