Japansese exchange 'Zaif' experienced a glitch that allowed users to place buy orders without having the funds to do so.17 people attempeted to take advantage of the glitch, which only lasted 18 minutes. The boldest - one order for $20 trillion in Bitcoin. (Funny because Bitcoin's market cap is only $182 billion)While the exchange quickly canceled orders and corrected their account balances, unfortunately it was still enough to catch the attention of Japan’s Financial Services Agency (FSA) - which is now investigating the exchanges security methods.