I would expect a drop of Litecoin to later buy because although it is rising a lot, it always ends up falling pretty much the value then rises again, for that reason would wait a little to buy.
I speak this in values ​​in BTC because if it is in Doláres there is not a bad time to buy because in the last years it comes only raising its values.
But buy other altcoins like Waves, Dash, Monero, Ethereum, that's a good idea too.