The Bitcoins themselves are secure stores of value. The Bitcoin exchange that was hacked was the victim of high-tech identity fraud, where spoofed Mt. Gox withdrawals were designed to register in Gox Systems as if they did not complete the transaction. Because Mt. Gox was using unsophisticated programming, their programs were fooled into sending out more money (Bitcoins). Mt. Gox also did not catch the drain on their Bitcoins anywhere near fast enough to prevent catastrophe. This is possibly criminally negligent business conduct of Mt. Gox, and users will be filing in class action lawsuits. Other crypto exchanges have secured themselves against this glitch. They have improved and progressed. Meanwhile, banks continue to lose more than $10 billion every year due to online credit and debit fraud. Credit cards were not designed for the Internet.