Yes, It's a kind of trading strategy wherein you're going to buy a coin that has a low price and you're going to sell it when the price goes up but in order to be successful using this kind of strategy there's a thing that you need to consider first such as:
Coin on where you're going to invest (Study)
Entry points and your exit points

But first before you start trading you should know that there's a high risk anywhere when it comes to investing so there's no guarantee that when you hold long you will earn, so invest only what you can afford to lose. If you're going for a long term investment i would suggest to buy Bitcoin(BTC) and Ethereum(ETH) because it's the most stable coin from the start.