By Justin Harper
Business reporter, BBC News

Publishedduration1 hour agoimage copyrightGetty Images

Bitcoin, the world's best-known cryptocurrency, has jumped above $17,000 (£12,800) to hit a three-year high.

The digital currency has suffered plenty of wild price swings since it was launched in 2009.

But investors have been flocking to cryptocurrencies during the pandemic-driven volatility on global stock markets.

However, experts have cautioned about viewing them as a "safe haven".

  • Bitcoin – what is it and how do you use it?t
  • PayPal allows Bitcoin and crypto spending
  • Exchange 'blocked 1,000 Twitter hack transactions'

On Wednesday, Bitcoin had climbed more than 7% to $17,891, its highest level since December 2017.

Some analysts said the Covid-19 pandemic has encouraged investors to reassess the long-term outlook for Bitcoin and other cryptocurrencies.

But there are still concerns about the fraudulent trading in cryptocurrencies following a succession of high-profile hacks.