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