Bitcoin price tumbles after exchange hit with $72 million hack

The world's largest dollar-to-Bitcoin exchange has been hit with a massive hack, which has reportedly seen 119,756 coins -- worth around $72 million at the time -- stolen from customer wallets. It's one of the biggest Bitcoin security breaches of all time, and a major blow to the currency's bid to be taken seriously. The coins were stolen from Bitfinex, a Hong Kong-based exchange that was well-regarded in the community. Executives of the company have confirmed the breach and that they're working