Bitcoin bounced back today after taking a big hit on Wednesday. The currency's value is close to all-time highs near $5,700. When we last spoke to Erik Finman in August, the currency was valued at about $4,200. Finman explains why he isn't surprised by the huge gain in value, and why he thinks there is still a lot of room to grow. One man who isn't so bullish on cryptocurrency is JPMorgan Chase CEO Jamie Dimon. In an interview Dimon said he thinks cryptocurrency is "stupid." Finman took that comment to heart, and responded by challenging Dimon to a boxing match. Finman explains why he came out swinging at the banking CEO, and why Dimon should be scared for his job.