I think new altcoin is a very good chance to get rich 
Get rich i don't know, but make some money that's for sure.
This make me think who pays it ? Those naive thinking the altcoins can stay longterm, or just those unlucky traders who dont sell before the dump happens ?
Not unlucky traders, just greedy traders who see a rising price point and jumps on before the dump, people who didnt do their homework on what they are buying. I guess alot of the new coins will come and go without much noise, some with alot of community support and nice new features will stay. At the moment, there are to many people making clonecoins that will die fast.