Bitcoin briefly drops 15% in rocky weekend amid controversy over digital currency's future

High volatility isn't going away for bitcoin, raising questions about whether the digital currency can be a sustainable investment asset. Late Saturday, the crypto-currency plunged 15 percent from nearly $6,500 to a low of $5,507, before intermittently shooting back up to near $6,400, according t...

Bitcoin briefly drops 15% in rocky weekend amid controversy over digital currency's future