A 200-week window is essentially a four-year average. When you smooth Bitcoin’s price over that horizon, what emerges is very close to the floor defined by the power law.

So why do people use this approximation of the underlying behavior? In many cases, it’s because they don’t want to explicitly acknowledge the power law. The 200-week average feels safer—more familiar and less committal.
But that clean, stable signal would not exist unless there were a real regularity in Bitcoin’s price dynamics.
The average is not the phenomenon—it is a reflection of it. It is simply a low-resolution projection of the deeper, scale-invariant structure that governs Bitcoin’s long-term evolution.
Green straight line or wiggly blue line?