Ethereum and litecoin ( from my recent point of view ) are the two alts that could be the good choices for the future benefits. Indeed, there are still many other good alts for long term holding like bnb, xrp, xlm and so on. But I guess ethereum and litecoin are the best among the other ones.
I would prefer to choose Ethereum rather than Litecoin, for now. It is surely that if I have enough fund, I will buy both Litecoin and Ethereum. However, if my fund is small and I have to choose only one coin to invest, temporarily, I will choose Ethereum. It is a strong support for my decicision with today dumps of ETH.