Bitcoin, the anonymous cyber currency, has had a wild few weeks. It's gone from less than $300 per coin to more than $900 just a few days ago back down to just over $600 today.

On Monday there was a congressional hearing on the currency for the first time, which gave it just a hint of legitimacy. It's technically possible to become a Bitcoin millionaire, but what's the likelihood?

Tess Vigeland talks to Ashlee Vance from Business Week about investing in Bitcoin the currency's ups and downs.