Best strategy is to have patience.You need to wait for a low price and sell after this with a high price.
We can hold the bitcoin Instead of buying the bitcoin and selling for high price...
Atleast we can hold the bitcoin until block halving.
The first time I did was analyze a bit of the market how it progressed and start trading. Before that I did my own research about the coins that I wanted to trade in the stock so as not to lose in the future