Try to handle your coins as little as possible. The condition of collectible coins impacts the value: dirty, scratched, moisture-damaged or otherwise imperfect coins can result from too much handling. Direct contact with your collection should be avoided, especially with coins in mint condition, but if you have to touch please do so by only holding the outer edge.

Cleaning coins is not recommended and should be done only by an expert, and only when absolutely necessary. Removing a coin's slowly developed patina might make it less tempting to collectors and possibly less valuable.

Although the majority of coin collection holders will store your coincollections safely, be sure that the really valuable items in your collection are safe from moisture as well as just fingerprints and dust. Aside from the typical stapled or taped packets that provide average protection, there are other protectors out there that can do a better job and guard against moisture as well. Protect your collectible coins when they are in storage by choosing a dry space and never one that is damp and cool, such as the basement.