A quote from cointelegraph

"We must transition from the Wild West market into a civilized one. And now, seeing that the Altcoin hype has cooled down, it should be easier to achieve since the number of paper chasers should go down as well. Be cautious and trade safely.

Finally, not every pump-n-dump coin is planned as a scam from the beginning. Sometimes developers who are trying to create a “new Bitcoin” tend to overestimate their capabilities or lose interest in their project as it progresses. And that’s when they come to the conclusion that it is time to cash out and move on to a new project. From the public’s perspective this kind of coin will look like a typical pump-n-dump despite the fact that developers have planned otherwise."