The recent crash in bitcoin during December 2017 to march 2018 is mainly caused by MT GOX lawyer by selling of large amount of bitcoin.
MT GOX is biggest exchange in Tokyo in 2011. The 75% of bitcoin was traded over there. They shut off their exchange stating that they were hacked because of technical issues and they lose 7% bitcoin.
Now, MT GOX lawyer selling chunk of bitcoin to pay the lawsuits on them. MT GOX still has bitcoin worth of 1.5 billion and bitcoin cash. Till September 2018 they cannot sell more bitcoin as they have meeting with court in September.
Experts predict that bearish market continue till September 2018 and after that bull run can start.