The cryptocurrency fell as much as 8 percent on Thursday on the Luxembourg-based Bitstamp exchange to hit $9,000 exactly, marking a fall of well over $2,000 in under 24 hours. It then edged back up to trade at around $9,400 in the hour that followed, still down roughly 4 percent on the day.
One market-watcher attributed the fall to outages in bitcoin exchanges and the heavy price surge of recent times.
"Naturally a few of the early bitcoin traders are taking some profits off the table," said Charles Hayter, founder of CryptoCompare.com.
"Volatility is in the market at the moment and that means both positive and negative moves."
The latest fall has tempered an astronomical rise for the cryptocurrency in recent months - bitcoin was up almost 1,100 percent year-to-date on Wednesday. As of 1500 GMT on Thursday, it was still up around 880 percent.
The rise has been fuelled by signs that the digital currency is slowly gaining traction in the mainstream investment world, as well as by increasing awareness.
In the past week, Google searches for "bitcoin" exceeded searches for "Trump" for the first time, data from Google showed, even though U.S. President Donald Trump has been prominently in the news this week.
Several large market exchanges including Nasdaq, CBOE Holdings and CME Group -- the world's largest derivatives exchange -- have said they are planning to provide futures contracts based on bitcoin.
Some investors have said such a development may prompt them to add the digital currency to their portfolio.
In October, Goldman Sachs chief executive Lloyd Blankfein said he was keeping an open mind on bitcoin following a media that the investment bank was exploring a new trading operation dedicated to cryptocurrencies.
Bitcoin's rapid ascent has prompted warnings from a stream of prominent investors that it had reached bubble territory, while the Bank of England deputy governor on Wednesday said investors should "do their homework" before investing in the digital currency.