"All digital currency that Coinbase holds online is fully insured. This means that if Coinbase were to suffer a breach of its online storage, the insurance policy would pay out to cover any customer funds lost as a result."
and
"This insurance policy does not cover any losses resulting from the compromise of your individual Coinbase account. It is your responsibility to use a strong password and maintain control of all login credentials you use to access Coinbase and GDAX."