Because the title of the site then and so my old bookmark reads "Crypto-Currency Market Capitalizations | Bitcoin Litecoin Peercoin Namecoin Novacoin Primecoin Feathercoin WorldCoin CryptogenicBullion Devcoin and more..." when I set the bookmark in around 2013. Only two, Bitcoin and Litecoin are still widely talked about, the rest has more or less gone into oblivion.
I just thought I'll mention it.
On crypto only the strongest stays..
Also the litecoin is not really popular right now, replacing each other is usual think in crypto i think.
People do that for high trading profits