There are so many coins, but many of them just a copy of anothers. Why they waste their time for nothing? 
Reason why so many people create their own coins or tokens i think it just for quick $$$
of course, most of them project just alive for 2-3 month and then gone...
Exactly, I dare say 95% of all ICO are a scam in order to get new funds. Just wait for when the market turns to a long term bear mode and these scams will probably die out. It's just unfortunate for all the money people will have lost on these useless projects, hopefully going forward people will get more serious on due diligence and really scrutinize all the new coins popping up.