Litecoin is a much more secure, mature, and evolving protocol. LN is coming. Atomic Swaps. Potentially confidential transactions. Since Litecoin uses scrypt it does not have to compete with bitcoin, the king, for mining.
Now consider the fact it's halving is less than a year away. Litecoin is the most valuable protocol of the 3, the long term fate of the other two is, well, questionable. Everything the other two aim to do, litecoin does better and more reliably, and without the noise of the circus.
No one even cares about either of the other two, they need figureheads to go on TV and speculative attacks simply to keep people paying attention to them. And don't even get me started on the amount of BCH Bitmain owns, sheesh. That's worse than the mt gox auction situation years ago with bitcoin.