Unless the docu is long enough (provided they make at least 8 eps) I think it would take a negative spin on the alt market. After all, these alts sprout up like mushrooms after rain, many just bringing investors and traders nothing but disappointments.
Surely it will.
Besides a huge amount of altcoins and scamcoins from 2017 all dark web stuff still can be considered as a "dark side" of cryptocurrencies. I bet that in that documentary all cryptocurrencies will be blamed and considered as an instrument of committing crimes. No matter if it if financial crimes with different Ponzi schemes, hacks, grug, gun or adult traffic.