Without a doubt VERGE/XVG is the most undervalued altcoin out there, less than a cent and it has a superb technology, which once wraith protocol hits end of this month will put its feature set far on par; above in fact monero and the rest of the overpriced privacy centric coins.
There is NOTHING and I mean NOTHING that will give you a better ROI than VERGE if you can simply hold for a year.