Your points don't make sense. Bitcoin can be bought with your wage or less than that, you don't need to buy 1 BTC or 2 BTCs to buy Bitcoins. You can buy 100000 satoshis and you you are already buying Bitcoins.
The adoption is low because Bitcoin is new, started few years ago and it's a innovative technology, things like this takes more time until become popular, for me it's going well and normal. Bitcoin potential will work on long term. Think big, Crypto Currency is a new step in the society evolution, everyone using this won't want to stop using.
Your points don't make sense. What does "Bitcoin is new, started few years ago, and it's a innovative technology" have to do with whether the OP thinks BTC is comparable to gold or worth of using as a currency? The features of bitcoin will not change with greater adoption or more time in existence. They are today what they will be tomorrow.
The idea of Litecoin is to use it for daily transactions and small amount of money transfer, while Bitcoin is the save haven.
This will also solve the problem of the capped blocksize of Bitcoin when less transaction are done on the BTC Blockchain but on the Litecoin.
I think Litecoin has faded away for this exact reason - it doesn't provide any benefit or alternative to bitcoin. The idea that it's cheaper to own 1 Litecoin than 1 Bitcoin doesn't make Litecoin any easier to transact with, in fact it's less valuable to own because it's harder to transact with Litecoin! Bitcoin is useable down to the hundred millionth of a bitcoin, the satoshi, so flexibility for the currency to adapt to any level of buying and spending is not the problem.