I'm not sure that Litecoin will go's higher, but most probably yes, however long time ago I invest in Bitcoin so far I'm happy about that decision, but I'm thinking to exchange it in other currency like something less expensive due to the fact that there are more probability to grow's up quickly.
Bitcoin is still the best option, so never give up investing in it. LTC is not as good as it used to be, its price is not going up too much this year even though we are in the bull market, I would sell all LTC and invest in Bitcoin if I had.