Ethereum is a great coin that you don't have to trade for any coin. I think if you have ethereum, you need to hold and wait for sometime before the market rises. Even if you want to trade for litecoin, just exchange 5% of it.
Holding Ethereum will be better in the future, if you have more capital, it's better to buy it, don't swap Ethereum with LTC.
maybe with Hold both so that the opportunities you get will be better so it's better to hold both of them, don't exchange Ethereum with LTC.