Me too. "Cupronickel (also known as copper-nickel) is an alloy of copper that contains nickel and strengthening elements, such as iron and manganese. Despite its high copper content, cupronickel is silver in color. Cupronickel is highly resistant to corrosion in seawater because its electrode potential is adjusted to be neutral with regard to seawater. For this reason, it is used for piping, heat exchangers and condensers in seawater systems, marine hardware, and sometimes for the propellers,crankshafts and hulls of premium tugboats, fishing boats and other working boats. Another common use of cupronickel is in silver-coloured modern-circulated coins. A typical mix is 75% copper, 25% nickel, and a trace amount of manganese. In the past, true silver coins were debased with cupronickel."
Assuming that you're hoarding to eventually sell... my take on this is that "hoarding" MS nickels to fill an album sounds fun and worthwhile in the end. You can do it for circ strikes, proof strikes, war nickels only, buffalo nickels, moderns v classics, etc.
Copper pennies to I sort them and save them but I'll let my kid look through them whenever he's ready. Zinc goes to Coinstar. Green ones go to Coinstar too.