According to coinmarketcap.com there are 668 coins on their site all trading. Do they all do something different or are there a lot of copy cats and if so, what do the 100% copycats have value?
Please show example if you can
no the majority do not offer anything new, but few of them like ethereum, decred, monero and zcash offer something that bitcoin do not have, they are for a reason the best coins to mien and to hold that you can find among all the crap coins, ignore all the other as a good project they are there just to fee your btc wallet