Bitcoin slides by over $1,000 in less than 48 hours

Bitcoin dropped below $7,000 on Friday to trade more than $1,000 down from an all-time high hit on Wednesday, as some traders dumped it for a clone called Bitcoin Cash, sending its value up around a third.

Bitcoin has been on a tear in recent months, with a vertiginous sevenfold increase in value since the start of the year that has led to many warnings the bitcoin market - now worth well over $100 billion - has become a bubble that is about to burst.

It reached a record high of $7,888 around 1800 GMT on Wednesday after a software upgrade planned for next week that could have split the cryptocurrency in a so-called "fork" was suspended.

But it has quickly retreated from that peak, falling to as low as $6,718 around 1330 GMT on Friday. It later recovered a touch to trade around $6,880 by 1645 GMT, but that was still down almost four per cent on the day.

"Bitcoin is all ups and downs," said Thomas Bertani, chief executive of Eidoo, a cryptocurrency wallet provider that recently became the first startup in the space to take out a full-page advert in the Wall Street Journal newspaper.

"The market realised that the price rise was an overreaching, so people started selling... (and) there are many long and short positions that amplify price movements." As bitcoin tumbled, Bitcoin Cash, which was generated from another software split on Aug.1, surged, trading up as much as 35 per cent on the day to around $850, according to industry website Coinmarketcap.