So as a back story, I am heavily invested into these two coins. Each one of them has their specific uses and I personally think that Etherium can do all the things that Litecoin can do, and then some. Litecoin's primary use is to transfer money from one place to another. You can do that with any cryptocurrency, and ETH offers that option as well, along with the same if not cheaper type of fees as LTC.
Now, they also offer smart contracts which will attract ICO's to use ETH. So with that being said, if you had to portion out 100% of your portfolio with either LTC or ETH, how would you populate it and why? I need some convincing on why I should stay invested in LTC.
First of all my strategy may or may not work for you because we have different perspective, knowledge and skill on how the market works. Your profit will depend on how will you manage your investments or on what goal do you have, If your plan is to hold coins for a long time, ETH would be your best choice for alt coin due to its cheap price and potential growth in the market, ETH has the 2nd largest market cap in the market and has a huge trading volumes too, which is really good for investing especially for long-term investments. I hold ETH and LTC but I made huge profit margin in ETH in the last few month especially last December 2017. You will not regret investing on both ETH and LTC because they're good coins in terms of sustainability and profitability, it will depend on your trading style.