No, they definitely do not need to be contacted, and those bitcoin don't need to be 'injected' anywhere.  In fact, it would be better for all of us who hold bitcoin if they never got touched.  The back and forth trading doesn't help anything as far as the price goes, or at least it's a small effect.  Dead coins means less supply which in theory should help support the price (as long as demand doesn't plummet). 

Bitcoin does NOT need to be used as a currency in order for it to maintain its value.  Not many people on this forum seem to understand that.  It's a commodity, like gold, and gold is no longer used as a currency.