A high-profile Bitcoin developer has said the crypto-currency has failed and he will no longer take part in its development.
Mike Hearn, a Zurich-based developer and long-time proponent of Bitcoin, surprised many this weekend when he published a blog calling Bitcoin a "failed" project.
Mr Hearn, who had until recently been working on new software for the currency, says he has now sold all of his own bitcoins and will no longer take part in the crypto-currency's development.
So, is Bitcoin doomed?
Chris Baraniuk | BBC