Out of the major ones, LTC seems to have better prospects than the others. Of course, BTC will always be the king because of its decentralized nature and strength to withstand attempts for takeover or hacks, but there are a few other alternatives available too.

Ripple seemed like a good option because there were a few whispers of endorsements but that obviously didn't go over too well. They've also got a centralized coin that they can manipulate prices with quite easily. Same for Bitcoin Cash, which is why they forked. And ETH, I'm starting to lose faith in as well for similar reasons. So it's a matter of choosing one that you think won't be messed with by the owners.