Also most low marketcap coins are very easy to manipulate and they are the ones that the manipulators mostly visit. Those slightly high and high marketcap coins are still not completely resistant to manipulations but low marketcap coins are the riskiest.
Manipulation is not only a problem in the cryptocurrency market because I have read about the same thing happening in other markets too but since I am not very active in those markets any longer, I can not say the exact way the manipulation is happening but for this market, I think the manipulation is getting out of hand because everyday, something ridiculous is happening yet exchanges keep listing this type of projects. Manipulation is now being called hype therefore it does not get enough attention for proper investigation to be carried out. Exchanges manipulate projects more when they are about to list and when they are newly listed. Exchange makes the most profits because they are never losing but enjoying inside trading privileges.