1. Only store your cryptocurrencies in a secure wallet. Never store your cryptocurrencies on an exchange or other online location.
2. Ensure the wallet you use is secure. For example, many hardware wallets are considered to be more secure than software wallets.
3. Set up two-factor authentication for all accounts related to your cryptocurrency portfolio.
4. Use strong and unique passwords for your accounts. The longer and more complex the password, the more difficult it will be for an attacker to guess your credentials.
5. Regularly back up the private keys of your wallet.
6. Be aware of phishing attempts or malware that could steal your credentials.
7. Avoid public Wi-Fi networks when accessing your wallet.
8. Don’t share your private key with anyone.
9. Keep your cryptocurrency holdings out of public view as much as possible.
10. Consider using a multi-signature wallet in order to have an additional level of security.