Hackers sent a series of malicious emails to Bitstamp employees. Of course, one employee clicked on the link in the email and ended up compromising the entire exchange. Jeez, talk about having a bad day at work!

This led to the hackers gaining access to one of the hot wallets of Bitstamp and ended up getting access to 19,000 BTC, amounting to nearly $5 million at the time. Fortunately, the majority of bitcoin was stored in cold storage keeping it safe from the attack. The company temporarily suspended transactions on the website as a precaution, only to resume in January with additional security measures.