The $210M market cap is assuming all 21 BILLION coins are released at the end of the ICO. This is an inaccurate calculation, as 21 billion is the cap over the lifetime of he coin. As of this post, there has been 711M electroneum sold, giving it a market cap of $7.1M. Once the ICO ends you will have a more accurate number. But it won't be 21 billion coins in circulation, that's for sure.