Last year, bitcoin closed at $6,443.22 as it tore toward a record high of near $20,000 hit in December.
On the Luxembourg-based Bitstamp exchange, bitcoin fell as low as $6,853.53 in early afternoon trading in New York.
Bitcoin hits another record high ahead of the start of its second futures contract; investors optimistic of hitting $20,000 mark
As bitcoin set a new record, digital currency exchange operators Coinbase and Bitfinex reported problems with service through their websites on Tuesday.
Bitcoin's meteoric ascent of over 10-fold from below $1,000 at the start of the year has drawn regulatory scrutiny around the world's economists.
Bitcoin jumps to all-time high after CME announces to launch a regulated trading venue for cryptocurrencies
On the Luxembourg-based Bitstamp exchange, bitcoin jumped to as high as $6,351, up almost 4 percent on the day.