Nothing other than the price. Knowing how to interpret the data on its value is important. With this we should also focus on the news updates and articles revolving around bitcoin. This is also a good indicator on how the price will fluctuate. Just like Elon Musk's huge investment on bitcoin, which basically made a huge impact, resulting to an increase in value. The data will also help you decide on when to trade, if you plan on it. Buying bitcoins in dips is good but do it at your own risk.