I sort of liked DASH, but then I found out it was being controlled by one person, see link below.  Now my favourite is BITCOIN

Dash Scam: http://www.nasdaq.com/article/op-ed-a-closer-look-into-dash-part-1-cm760740
http://www.nasdaq.com/article/op-ed-a-closer-look-at-the-origins-of-dash-part-2-cm761072