Another example why using central exchanges is risky. The hackers knew private data of the users. One corrupt employee or one successful hack and bad guys capture your email, home address, phone number and sell it to local criminals who might knock on your door then best encrypted wallets are useless. Cryptocurrencies are designed for peer to peer usage. If you change it into peer to bank to peer then this adds some risks.
Coinbase is a registered exchange and i believe they are insured and i do not think the end users will be loosing their coins. No one in the right sense would hold their assets in centralized exchanges or wallet as they are always prone to attack and if they are not taking care of their security seriously or incompetent to handle the security the end user will suffer. Sad to hear about another major hack yet again.