Bitcoin or Litecoin please help!

If you're looking to invest long term then the definite answer is Bitcoin. Past patterns show that clearly. However, if you're in for a short term, then it's a toss up between Bitcoin and Litecoin, even then I'm more bullish on Bitcoin than Litecoin. If I were you, I'd consider Ethereum as an option as well and evaluate from among these three choice. It's just my humble opinion though, so don't take my word for it and do your own research.