Yesterday, social media lit up with the news that bitcoin creator Satoshi Nakamoto had emerged from the shadows to make a transaction.

The mysterious figure is estimated to own somewhere in the region of one million coins, all mined during the currency's early months. His fortune, now worth $281.6m, has not moved in six and a half years.

Yet speculation bubbled after a user spotted what appeared to be signs that some coins had moved, according to data from Blockchain.info. The site displayed coins in bitcoin's genesis block, or 'block one', moving to an address created this year.