► Subscribe to FT.com here: http://bit.ly/2r8RJzM<br /><br />Bitcoin futures surged more than 20% on their debut on Monday, forcing a major US derivatives exchange to halt trading twice as Wall Street seeks to ride a wave of interest in the controversial digital currency.<br /><br />► Subscribe to the Financial Times on YouTube: http://bit.ly/FTimeSubs<br /><br />For more video content from the Financial Times, visit http://www.FT.com/video<br /><br /><br />Twitter https://twitter.com/ftvideo<br />Facebook https://www.facebook.com/financialtimes