I believe the next wave of the bull run is about to erupt as CEO of the biggest asset management firm BlackRock Larry Fink said bitcoin can evolve into global asset. There are more big guys from Wall street getting involved in bitcoin too. We won't possibly see any serious corrective retracement anymore.
https://www.coindesk.com/blackrock-ceo-bitcoin-global-assetBlackrock is the world's largest asset management, if the CEO already stated bitcoin possibly become a global asset, then they might have been investing in bitcoin secretly as well because support from major traditional financial players is relatively rare. That's the difference between the rally in this year and 2017, many traditional financial players buying bitcoin as a reserve asset or for a long term investment.