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Lots of these are quite popular nowadays. Some enthusiasts prefer to proudly showcase their coins in archival folders, while others prefer airtight capsules, or mylar-lined 2x2's. Whatever you choose, don't store yours in the soft flips you frequently find on the market. They are made from polyvinyl chloride which breaks down over time and ruins the coin it was to preserve. If you acquire a coin already in such a sleeve, move it as quickly as possible to something better. You may consider acetate flips, but understand that they are hard and may scuff the piece if isn't inserted and removed with care. Although they are not airtight, they're adequate alternatives for moderate value coins that will be "left alone" for many a long time.
This is certain: regardless of wherever you choose to keep your coins, it will always a source of continual pride.
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