If your intrest is getting also some profit I woiuld choose LTC.
Think about how much BTC needs to rise for you to double your money? From ~2000 USD to ~4000 USD
And litecoin needs to bounce from 20 to 40

Imho BTC train is long gone to make profit.
Offcourse it's a bit less riskier than LTC. But your call.
I got my euros in LTC. Bright future ahead for that coin.