"fast cryptocurrency that big corporations like Amazon were going to start using
Guess that's not happening anytime soon, right?
Litecoin isn't on my favorite coin list, but it's relatively old (in crypto years) and established, and it is one of only a few coins that's going to make it in the next 10 years. It's too bad that there aren't more businesses that accept it for payment, nor more people who invest in it. It just isn't as popular as other cryptos, but it's very far from dead. If you want to know what dead coins are, look at the ones on exchanges that sell for at or close to 1 satoshi, the ones that don't have any buy orders. If you look at litecoin in that light, it's alive and vibrant.
Litecoin won't die in my opinion and it makes for a good currency. Its popularity waxes and wanes, but overall it's one of the best coins out there. It might not be the silver to bitcoin's gold, but it's still a damn good coin.