I don't believe in such rumors. You can't become someone if you have your own personality. Bitcoin will never be replace as it has its own role on crypto. Bitcoin is already the very foundation of every coins. Litecoin will create its own name and will continue to walk the path where it wanted to be.
I agree, bitcoin is always on the top, it can not replace by any coin, maybe some of those coin now are good but they can not replace bitcoin especially now that the price of litecoin and bitcoin are very far away.
I agree with you, replacing bitcoin is very difficult. In my opinion, Litecoin requires a long process and a stable step follows bitcoin. But Litecoin also has a dependence on Bitcoint if bitcoin continues to climb, litecoin will be hard to catch up. Unlike the case if the price of Bitcoin drops.