Of course that bitcoin and ethereum are the major cryptos and it will always be like this, but you should know that everybody is interested in just investing in more revolutionnaire and innovative projects, such as ICO's and other kind of projects that we are seeing everyday.
I don't know if it's just me but I've always struggled understanding the appeal of certain altcoins. The only two coins I see potential in are Ethereum and Bitcoin. Ethereum has amazing potential with smart contracts
Litecoin just a copypaste? i agree, but this "copy-paste" has been the most succesfull copypaste that somene could created that has a value of more than 12 billion dollars.
Litecoin - Charlie Lee did a copy/paste of Bitcoin and made a few minor changes, doubled number of coins, changed algo etc. Sure Litecoin beat Bitcoin to adopting SegWit, and will probably get a stable Lightning Network
And i agree with you about Zcash, zcoin, zCrap, and all the other cryptos that start with Z.