There is a saying in forex and stocks trading that "the trend is your friend" this is truth and I really see this as one of the trading secret not to break and it is good you invest from the beginning of the trend in both directions and sell when the trend is about to come to an end.
The most difficult decision to make in trading either crypto currency, Forex and stock is to be able to identify whether the market has reached the bottom. This is because, the position you claimed is the bottom might turn to be the peak later and this kind of a thing has happened to me while trading Forex before now.