What may have been happening with bitcoin and bitcoin cash by an unknown expert

True manipulation.

I don’t believe that markets are unpredictable 100%.
Governments and corporates are really greedy and they want to control everything, all the Data possible.

And how to do that with Decentralized crypto?
A lot of people already have a lot . (During 2009–2013). And number of Users keeps growing. And then corporates and governments see that eventually digital currencies will be leading the world. But it is too late to enter markets - you will just lose a lot on it.

And they start boosting prices. People are buying. During all the time price is dropping (Especially on Major coins) and a lot of people are losing money. But Blockchain is here and not going to go anywhere.

People are losing money - more people are scared. Social media posting “bubble burst” and etc…
Regular people got rid of coins. And now time for INSTITUTIONAL INVESTORS. CORPORATES. GOVERNMENTS. YOU OWN MAJORITY OF CRYPTO. Easy win. And then people will purchase it for really huge price. But it won’t belong to people. Money system will be the same with LESS technical errors (that blockchain solves for example in transactions).