At least this week, bitcoin earned some points toward being a safe haven trade. The digital currency jumped more than 20 percent to a record high this week, while global stocks fell amid escalating tensions around the North Korea nuclear threat. Prices of the traditional safety asset, gold, rose just 2 percent to a two-month high. Bitcoin climbed more than 3.5 percent Friday to an all-time high of $3,586.23, according to CoinDesk. At that price, bitcoin has gained 24 percent since last Friday and more than tripled in value for the year.Bitcoin's gains followed an uneventful split last week into bitcoin and bitcoin ... (full story)