Bitcoin exchange Mt. Gox disappears and takes $300 million with it

Bitcoin's future is in doubt. On Tuesday, bitcoin exchange Mt. Gox disappeared and took roughly $300 million in alternative currency with it.

Mt. Gox is the world's largest bitcoin exchange and its closure triggered a massive sell-off on the remaining exchanges. The future of bitcoin is now in doubt when, just last week, the currency was beginning to get more widespread acceptance among mainstream retailers. Story