altcoin is alternative coins or alternative crypto currencies.

they are supposed to be alternative to bitcoin, and they must have some new features that are useful. they should try other areas and bring on new technologies to crypto currency world. and many more features.

but all of these are only what they are supposed to do.

in reality, what happens is that altcoin means a copy pasted code, or even in some cases a poorly coded code with lots and lots of bugs which is only created to get pump and dumped and make a certain group of people richer.