best strategy since "buy low sell hi"
I will agree with you that the best strategy is to buy when the price of coin is very low and sell when the price is high because it is good way to make reasonable profit in crypto but you must learn how to hold and not panic because the price can even dip lower before it will rise.
It happened just like a few days ago. The price has decreased and we should buy it. But sometimes we can lose momentum because for me that time is very helpful in determining what we get. So focus and pay attention to each price movement that occurs and then the analysis so we will determine whether we will sell or buy it.