2017 Majority of the altcoins reaches their all-time high and 2018 is a big turn around some coins hit their bottom low, what is this big factor or major update that can get make all the coins to reach their all-time high again.
There must be a huge FOMO to the market and the institutional investors will have played a big role in this case. As you can see the fact that so many people were rushing crypto last and that made crypto touched its ATH.