One reason may the EOS.IO Developer Update by Dan himself. It shows promising things to come and i wrote also in several posts about EOS because i think it adresses many things in the right way. But we should also consider the token sale isn't over yet. About half of the tokens are out now (556 million). For distribution there are 444 million left and will dilute existing shareholder value in the next 7 months. Maybe we see a sharp fall after this pump because the token sale is going on til June 1st 2018 from what i know. Maybe it's FOMO and will further pump the price for a while.