A big and dirty game is going on by the sharks and we are just trying to guess what may be the reason. But we don't have any clue. With the recent price increase of BCH, I expected that many miners will move to mining BCH as the difficulty is low compared to bitcoin and the price is also skyrocketing. So many people get to earn some good amount of money till the time difficulty is manageable. However, I don't think bitcoin will die in any way. It is just having some difficult time and we all have to survive it together. The current bitcoin price looks tempting to me for buying more but I just want to wait and watch for some more time to properly understand the trend.
Well I will give you a clue, Chinese! This is a big and dirty game, you are right about that! What they doing is moving the money and hash power from bitcoin to bitcoin cash, now that slows down transactions making them more expensive and that is a long term trouble if mining power continue to fall down.
https://www.coindesk.com/confusion-euphoria-bitcoin-cash-30-billion-2000/amp/Look at the names in this article, Chinese are creators of this and they are making huge attack on bitcoin, they did awesome move with joining miners and companies and they are very serious in pushing this trough. What can we do, what is smart to do? I really don't know.