Digital currencies - Virtual, but real

Litecoin, Ripple, Ethereum, Ethereum Classic and Dash. They sound like a virtual reality version of Santa’s reindeer. 

In fact, they are crypto-currencies that have emerged in the wake of the best known digital currency of all — Bitcoin.

Created in 2009, Bitcoin reached an all-time high above $11,000 yesterday and has increased more than 10-fold in value so far this year.