Can someone explain me why we need them? I mean, if every shop adopt bit as payment will be expensive to adapt other coins as payment also.
So , why we need those alt currencies in a economical/performance view?
thanks
We don't really need them because most of them have no new features. People however sees them as an opportunity for them to be in during the early stages so the look appealing. Some people even argue that altcoins are good for the ecosystem but i don't think thats the case.