If you have much much money to invest, you should choose BTC. It is better for short-term profit or long-term profit.
If you only have less than $5000, I suggest you invest into altcoin which will be rising star such as ETH (this is my opinion), LTC, or you can find the useful informatins about the altcoin at coinmarketcap. You search for top 10 coins, look at its website, its plans / roadmap, how they solve problem, etc.