If you want to earn more profit then you should choose BTC to invest in the long term, Btc is the best at the moment and there is no reason not to choose BTC.If you want to get more profit in the short term, then you can choose to invest in Litecoin.
I think many people underestimate LTC. in the long run, it can bring more profit than Bitcoin. but there are other altcoins. for example NEO
That's probably true actually. I tend to say that it's Bitcoin that's always underestimated by people, then again we've always got those experts and influencers telling us about Bitcoin going to 100k or even 1 million, so I guess there are plenty of overestimates as well. But you don't see this with Litecoin. Absolutely no one I can remember ever saw it hitting those ATHs and certainly not so quickly.
Litecoin always interesting because of its admitted uses that aren't super ambitious. But Bitcoin is always my chief buy.