Some of them are useless my friend, really useless, there is no need for denaying a truth. They are just bad copies, nothing more, and like every bad copy, there is no future for them.
I would say that 85% of all coins are really useless, while the remaining 15% are working, promising and are mostly in the top of the market.
With the number of coins out there, it`s reasonable to think that more than 85% of them are useless. I must agree with that, they are just schemes for some people to make fast money, pump and dump coins, how people like to call them.
This is the reason why people should do research before investing, just 15% have some future, others will die along the way.