In my opinion, you should do your own research.
Dont pick any crypto just because other people say it is going to RISE TO THE MOON in 2018, or because you saw a 30% increase in 1 day.
I cannot stress this enough, dont do what other people are doing but think for yourself.
Dont be one of those FOMO people.
Be critical and look at each coin from different perspectives.
Give a man a fish, and you feed him for a day. Teach a man to fish, and you feed him for a lifetime.
I understand the need for us to do our own research before deciding which coin we feel is the best next to bitcoin but that being said I also think that the market speaks for itself when it comes to issues like these. You look at the market in terms of project, market prices and market value and it is not hard to tell that the next best coin to bitcoin is actually ethereum.