1/2 Oz Canadian Gold Coin

For the best protection I keep the few
gold coins I have in air tites.
Gold is the softest of the alloys used
for coins and can be easily marked in
a 2x2 if something were to hit it.

and yes, I do not own many gold coins but the few I do own are all in air-tites.

that looks and works just fine..

If you want a direct fit holder at some point, you'll find that there is no Air-tite that fits just right. Lighthouse/Leuchtturm makes a direct fit 25mm capsule that would be perfect for the 25mm 1/2oz Maple once you've cut the packaging away. They also make an unusual 32.5mm which is the only capsule I've found that will properly fit a 32.69mm Queen's Beast 1 oz (33mm allows the coin to move around too much, 32mm is too small).