It talks volumes about the internal controls at CB that it took a tweet to expose this. Given the speed with which they grew last two years I expect their financial and security processes to be next to nothing. This is just tip of an iceberg. Insiders would have made tens of millions over last two years of bull run, if not more. This dude just got greedy and unlucky to get caught just as the crypto bubble began burst…
It talks volumes that had they done this in a privately held network, it might have been harder to catch them.
All the "blockchain is anonymous, hence it's made by and for fraudsters" is a total nonsense.