there're many reasons behind this pump,for example;
because of this ;
https://twitter.com/CNBCFastMoney/status/986619810518917120
or it might be due to Bitcoin itself,Bitcoin showed us a beautiful movement for the past few days and until now everything is moving up.

in my opinion,i believe it's due to Bitcoin movement.
people started to regain their faith on cryptocurrency and believe it's starting to make its move again in the next few weeks later or around that.