One of the biggest complaints by people in and out of the
bitcoin industry, is how insecure exchanges and third party holders of
bitcoins can be. Bitcoin’s young life has been riddled with numerous
large thefts of the digital currency - the most notorious one being
Mt.Gox.
More recently, a large Chinese bitcoin and altcoin exchange, Bter,
was hacked - losing 7,170 bitcoins (Currently worth more than $1.7
million US). The exchange was unable to cover their losses and had to
take out a 1,000 BTC loan, from security firm Jua.com.