The defining line between the two camps is whether you bought the scrap or acquired it through labor. If you purchased, my opinion is that one in the hand is worth two in the bush as the saying goes. Take a little loss now and buy at prices in the new market. If you haven't purchased but acquired it through jobs, as a byproduct of your business or other means then perhaps you can hoard until prices go up. However, as other members have said, your stockpile of copper is very tempting to thieves. It would be a shame to wait a few months to see prices start going up but someone came along and stole your stash.