Wow. I see everyone is mentioning word "Panic sell". But it's actually profitable sell of BTC for buyer who bought for very cheaper price. Second important thing is US debit. Many users are getting involved by buying at current price but HOLD could take user towards risk with their equity. No one control crypto market is just concept but everything is managed. Whales who bought BTC at cheaper price can be easily manipulate market, and here is an example of centralization of BTC.

By next year 2020 halving is there. And generation of BTC with be again reduced by 50% of current block rewards, SO it will be hard for miner to keep and maintain their investment with lower ROI. And without miner, BTC is impossible to sustain on network. People are removing interest from BTC.