Cosmos (ATOM) Can be stored in a digital wallet kept on your desktop or mobile device. This is called an Atomic wallet, and it is a storage location provided by the Cosmos ecosystem. To store ATOM over a long period of time, you may want a hardware wallet that provides offline cold storage. This prevents hacking and makes it difficult for anyone to access or steal your cryptocurrency.
Storing cryptocurrency does not protect the value from changing. The Cosmos price may have greatly increased or fallen by the time you access your token and traded from the wallet.