Be careful.  Silver is the most fickle of metals.  In fact, the gold-silver ratio has been expanding, despite some well known bulls being very loud about a huge correction coming soon.  They may be correct from a historical and technical viewpoint.  However, as more copper is produced, and as recovery methods improve, supply of silver will also be expanding, as that is where most of it comes from (mixed metal deposits).  I have to shrug, then, about silver's prospects compared to other metals. 

Happy to have silver in any polymetallic project, of course, but gold, moly, cobalt, etc., may be better bets for the long term, IMO,...at least in so far as individual metals are concerned.

VP