The myth that the blockchain is unhackable has fallen
Technology Review: I’t confirmed by the recent “51%” cyber attacks, last one against Ethereum Classic, and by the cyber security weaknesses in the smart-contracts.
Collection #1, the cybercrime hacker behind it is dubbed C0rpz
Recorded Future cyber security experts: He sold it to other two actors: Sanix and Clorox. Also a Russian hacker is sharing a db of 100 billion user accounts.