I don't think a major player of any company would ever get away with publicly announcing that they will be dumping their company's shares and recommend everyone else should do the same. Then right afterwards the stock tanks.
Wouldn't that cause a reaction with certain regulators???? Like Jail Time!
By the way the futures market bet on Bitcoin, Ethereum, and Litecoin to go down. This all looked like a well orchestrated event.

The problem is that since these cryptocurrencies are not government regulated and governments tend to hate cryptocurrency. No one is going to do anything about this. These big fish will continue to manipulate the market and steal money from less experienced people, because they will make tons of money and never need to worry about seeing the inside of a jail cell.