Not an ETH fan, but I would admit that ETH has one of the greatest technologies that the crypto world has ever seen. LTC has an active and hardworking leader and dev team, as well as one of the biggest communities in crypto. They have been testing new features such as segwit and LN that will hopefully add more firepower to BTC.
These two has proven themselves to stand the test of time. And if there will ever be a collapse in altcoins and s***coins (though I hope it won't happen), these two will be one of last cryptos standing.