You have to choose your earning strategy based on your character traits. For example, if you are calm, then you can try hodling. If you are gambling and active for you arbitrage between exchanges)
Earning strategy of what? The first thing that you should have is a knowledge, if you are a newbie you need to understand the role of crypto how it works, and the movements of crypto currency. Experience is the best to have an strategy for trading and of course you need to analyze it.