I would think these are going to be primarily bullion products with high grade specimens gaining value much past our lifetime....
I think Mint BU original rolls will be worth keeping but saving the more recent pennies in circulated condition won't really be worth the effort.
Actually, the only canadian pennies that were 95% copper are from the late 1850's. the more modern ones are 98% copper (1942-1996 if I remember correctly)