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.
If you give your 100% money on only one coin between Ethereum and Litecoin, I would be choosing Ethereum. But I hope you are not getting me wrong, Litecoin is also a good coin and is very much a good choice for investment. Litecoin is a very solid project that would definitely go a long way in the crypto world. But since you are only asking one among the two choice, I give you Ethereum as my answer. Ethereum is a very strong crypto in the whole world, second to Bitcoin. It has so much to offer to the world.