Someone comes and explain what is features of newcoins ? Is there a website that classify coins with special features that BTC hasn't it and compare their with other coins ?
As I always say , alternative coins are simply some cheap copies and Bitcoin is the original and the unique thing .
Since Bitcoin is the original & Open source , people simply take BTC , edit it & make their own coin most of the time it's for pump and dump as Muhammed Zakir said , however there is some of them have features that Bitcoin don't have , some of them don't use same Algorithm , some of them is fully annonymus like Darkcoin aka DASH .
That's my personal opinion to be honest , but if you want an advice , simply stick to Bitcoin because it's the most known and it's accepted more then the alternative (either via web or real life) Welcome to the community .