BTC has big market, it's the most stable coin. You could hold and hope for growth.
bitcoin.org gets about 2.4 million visitors every month, all the way from march 2016.
dogecoin.com gets about 110.000 visitors this month, but they used to be 160.000 visitors a month
dash.org has 350.000 a month, they used to be 120.000

The data doesn't make much of a mystery. Go with bitcoin for stability. Go with dash for possible quick profit. Forget dogecoin