It’s called pump and dumps and it has been around ever since the unregulated stock market days. Those who are new to trading will sooner or later learn this lesson particularly when it comes to crypto trading. Unfortunately, there are no clear regulations for this as of yet. As much as we all hate SEC, we need them to help prevent these.
The sad part is it seems like it's not one party. One group or one person with maybe a psychological disease seems to be trying to get attention through shoving money into the market, whether it be fake or real. Then, the innocent traders have to deal with it, therefore creating the "dump" at the end.
(Most of) the ups seem to be made by someone with a problem these days, which in turn creates felonies, especially if bitcoin is legally a "commodity" now if it's through harassment, violence, and force. The downs are made by normal innocent traders trying to deal with these felonies and keep their money after they basically get terrorized (bitcoin didn't used to be this "uncomfortable" everyday).
That's the sad part, the innocent traders have nothing to do with the "dumping," as if it's illegal. This market has tried to become violent towards sells and do everything they can do blame them for their problems instead of understanding the market and using them and gosh forbid, maybe do the same thing sometimes.
No one is a hero for fighting the sells. If this group of traders were smart they would have realized by now that using the sells instead of fighting them would give them more "power" instead of being ignorant all the time. They've obviously had enough time to learn how to buy -and- sell.