Nowadays it is hard to find the best ICO, but if you ask me then everything that NXT and LISK own, like has a clear purpose, great team and community, popularity, etc. I participated in their ICO just for your information about their ROI, as for LISK is about 6414% while NXT is 598054% which is crazy, I'm surprised that some people are being a millionaire by participating in this ICO, but now too much failed and scam project.