I guess that this sudden bull run started because of the news regarding BlackRock. They set up a working group to look into cryptocurrency.  BlackRock CEO confirmed that it is a true story. He was against bitcoin earlier. But they are now searching for opportunities with crypto.  

This is a major reason for the bull run and BlackRock is a giant investment management company in USA.

My expectation is that cryptocurrency price will rise gradually in long term when businesses like BlackRock starts to use cryptocurrency.