Bollinger bands applied on the 1M Log chart create this fjord/valley forms that signal in advance that the peak is arriving and that we are in a big bubble territory.
This won't tell you the exact month when to sell, but it signals when we are entering the bubble territory, so you can know whether or not it's still safe to enter, and start selling going up hill.
Vertical lines are halving dates just for reference. The red circle is an approximate when the peak will probably take place.