I posted a history of silver chart a long time ago showing how the price action moves. Silver was at its most expensive long, long, ago. I will see if I can find the chart again.
Of course there were many variables on that chart like trying to fix a value for the USD 400 years ago. Suffice to say silver is way underpriced based an many historical comparisons. It can stay that way for long time to come as well. Within that though expect to see some peaks and valleys.
Nice thing about silver is it is truly a miracle metal with great metallurgical uses. Health applications, electronic, coinage to name 3.