Sa mga medyo matagal na rin sa Bitcoin at cryptocurrency madali lang sagutin ang tanong mo. You buy something when it is at its dip o habang mababa pa sya para pagtaas nya ulit eh malaki ang kikitain mo. Kung bibili ka habang mataas sya pagbaba nito eh di lugi ka. This is the most important rule when you are doing trading much more so in cryptocurrency which can be very volatile. This can be the most effective way to make money in cryptocurrency but this rule is also very much applicable in traditional business where people buy low and sell high...parehong idea lang yan sila. I hope I answered and contributed something valuable to you.