The best way to securely store your cryptocurrency is to use a hardware wallet. A hardware wallet is a physical electronic device that stores the private keys necessary to protect your cryptocurrency and allows you to access it in an offline environment. The most popular devices are the Trezor and Ledger wallets. They both come with their own set of features, so make sure to do your research before committing to one. Additionally, you can also use cold storage by transferring your funds to a paper wallet or using specialized software such as the Electrum Bitcoin wallet. Whichever method you choose, make sure that you keep your credentials safe and never share private keys with anyone.