I think silver is highly undervalued and should be at least on par with gold, maybe its boom is just a little bit behind gold?
It depends on who the distribution of silver will be in the future. China controls most of the silver supply and manipulates the prices. But as the demand rises the price will change accordingly.
Despite who holds how much silver like china or other valuable metals. They only move holding it cause they eventually want to be a world reserve currency like u.s.
The value will high if the actual commodity is in a high demand for it based on manufacturing alone. But just keep in mind that if there is replacements to create something like that missile that was used for, there can be cheaper elements to assemble something people will move towards it.