These are some beautiful coins. I'm holding on to quite a few similar coins from my late grandmother. I always wondered why do the quarters (i.e. standing liberty) always seem to wear the most of the various US coins from way back then (mine are all worn)?

Do you think all the gold/silver shops that pop up and offer money for coins, then go and melt them, will over time help make our coins more rare and valuable? Or am I dreaming, I'm no expert in this area!