According to some information someone from 6 of July have acces to roughly all Alphabay accounts with total of 3.8 millions equivalent in $$$
They just broke the accounts and sell the coins.
https://www.neowin.net/news/alphabay-market-is-down-leaving-some-to-speculate-that-millions-have-been-stolen-from-usersStill there is no information from officials about Alphabay servers have neen busted by Canadian police. Its all rumors..
I personaly think Alphabay have stolen $$$ from the users and dump the price ATM. Especialy for Zcash, which they use to be annonimous. Because hackers need cashout as soon as possible throw the annonimous coins..I think next dump could be Monero.
As Zcash and ETH allready fallen much.