Coinsecure loses $3.5 million
Coinsecure recently had a breach and lost nearly $3.5 million. Their chief of security seems to be the prime suspect who they assume has run off with the money.
As per the article it would appear that the coins were stored in a cold wallet, the private keys of which were controlled by CoinSecure and mainly by the head of Security there. In such circumstances it is very easy for malicious actors to exercise control over the funds in question.
Don't keep your coins in an exchange.