The best way to securely store your cryptocurrency is to use a hardware wallet. This type of wallet stores your private keys on an offline physical device, eliminating the risk of online hackers and malicious attacks. You can also use paper wallets which store your private keys as physical documents that you can store in a safe place, such as a safety deposit box. Additionally, you can also take advantage of cold storage solutions, which allow you to store your private keys on a USB drive or other types of media disconnected from the internet. Ultimately, the choice of storage will depend on your specific needs, but all of these options are secure and reliable.