Rising price of the cryptocurrency, now worth four times as much as an ounce of gold, has led to warnings of a bubble
The price of bitcoin has smashed through $5,000 to an all-time high.
The cryptocurrency rose by more than 8% to $5,243 having started the year at $966. Bitcoin has soared by more than 750% in the past year and is worth four times as much as an ounce of gold.
But the price has been volatile. The digital currency plunged below $3,000 in mid-September after the Chinese authorities announced a crackdown. Beijing ordered cryptocurrency exchanges to stop trading and block new registrations, due to fears that increasing numbers of consumers piling into the bitcoin market could prompt wider financial problems.
Read more: The Guardian