With a 94 percent year-to-date gain, and a single "coin" now worth $1,843, bitcoin has been on a helluva run lately. The increase in the cost of the massively-volatile electronic tokens has led to many comparisons with that other favorite outsider ``currency'' -- gold -- recently. True, a unit of Bitcoin passed the dollar value of one troy ounce of gold this year, and is now more than $600 higher. But the daily swings in the digitally created asset have been vast. Even during the huge run up this year, it has moved more than five percent on 21 different days, with nine of those being moves lower. Gold on the other ... (full story)