Litecoin and Dogecoin fill a niche market for purchasing coins with small values - Like a silver and bronze (copper?) to Bitcoin's gold.
This point is kind of weak... i mean you can buy a fraction of bitcoin and here you go.
Exactly, they fill no niche market. Maybe Dogecoin did since it was used as a tipping currency, but Litecoin is simply a Bitcoin clone aka the first shitcoin.
Litecoin, the first shitcoin.