are the developers shitting on people who think that altcoin is an opportunity to be rich ?
As far as i understand about the purpose of those coins were nothing, This caused by there is no clear roadmap, There is no a decent whitepaper to explain about the target of the project itself and the important reason is the unknown developers are claiming that about to be another satoshi which that was very shady thing because that was just an asset in the ethereum platform. Alex van de sande as the ethereum co founder already made a step to create the asset. That's pretty strange to become the next satoshi if all of them are pegging with the ethereum itself.
are they try to increase the price with holding it then the just sell and get out of the market with huge benefit ?
Nope, they are trying to hype its project and for your information about the more people will hype the project that makes the more investors will try to take a look on its token. So this was pure hype and nothing to do about all of the eshittoken.