I do not understand you, although I'm still learning how to study the volatile market but even with the studying of the market and predicting how the price will go is not always 100% accurate,you can predict very well but at the end of the day the price might even turn against you, what should one do and what is the HODL you are talking about .In this kind of situation, you need to be technical enough to study the trend i.e. know when to buy or sell. As a matter of fact you can employ the concept of HODL.