silver investment: The Lowest Risk, Highest Return Potential, page-213

Why use the frame of 7 years?

Oh, so you can disingenuously show Silvers performance since the exact moment in fell off its post GFC peak.

Do you start every chart from when something falls from it's peak, or just PM's?

Look at this Dow chart below, showing one time (out of many) when it fell of its peak.

Surprise, surprise - markets can go into Bubbles!! Tell us something we don't know Skol.