A Very Volatile Week

Bitcoin falls by more than $3,000, dropping through $13,000 mark
Bitcoin fell through the psychologically key level of $13,000 before regaining some lost ground.
Cryptocurrencies have traded in a volatile fashion for several days.
Ripple is the only major cryptocurrency that's moving higher.

Bitcoin and several other major cryptocurrencies plunged Thursday evening New York time as the end of an exponential year of growth neared.
The slashing decline triggered temporary, built-in trading halts in the bitcoin futures traded on the CME and Cboe.
Bitcoin plunged more than 20 percent to a low of $12,504 according to CoinDesk, down more than $3,000 from $15,820 less than 12 hours ago. The digital currency recovered slightly to $13,545, as of 4:09 a.m., ET, but was still down almost 13 percent for the session.