The truth about crypto currency is that it is more about hodling, technically, crypto is hodling.
Most people that has been able to take profit from crypto currency trade or investment are those that have mastered the act of hodling.
Knowing when to hodl, when not to hodl is an important skill you need.
I agree that we must understand when to sell or when to hold. Cryptocurrency price movements are very volatile and we can regret it if we are too late to sell. We need a target selling price if we don't want to regret it