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.
The Litecoin is "silver" to Bitcoin as "gold" has always been a silly argument to me, since Bitcoin can be as little as one satoshi (0.00000001 BTC => currently worth US$0.00000477). It is hard to imagine a scenario where you actively need values less than that, although at times transaction fees on Bitcoin can be an issue on small amounts. Service-level wallets are an easy solution to that point though.
I had the same question. Bitcoin in compare with Gold can be divided into small amounts and there is no need to use altcoin as a Silver to Gold.
it has one more advantage - its on almost all markets with USD and other coins will have hard time getting there
after milion dollars were pumped by speculators to BTC now its easy for tchem to do same with LTC - just for pure buble profit
u need to be able to diversificate ie if 51% happends - thats where LTC comes