Among project born in 2017, Horizen, (formerly ZenCash) is one of the strongest and most professional crypto currencies. It is not only reflected on the  survival of Horizen over months with Bear domination, but also demonstrated through the development of Horizen. It's the way Horizen team increased privacy of the coin, and created, then managed Horizen forum so well. I saw that active communication between Horizen team and their community is another plus point.