With the vast number of coins and tokens it's impossible to predict who's next. First we wait on BTC to see how it dictates the market! 

Some coins/tokens I'm keeping an eye on are EOS, OMG, ZIL, ICX, XSPEC, KMD, RHOC and many more. Too many choices really, we just have to do our due diligence and hope we get some of the big winners longer term!