Not your keys, not your money!
Only those who have the private keys ultimately have access to the coins.
Do not use links to other websites (E.g within e-mails) where you have to enter your user data (The same also applies to e-banking). It is better to enter the address directly in the browser or via Google search. Even Google ads could be fraudulent. Therefore, always use the top search result, which is not an advertisement and check the address for abnormalities. As a bare minimum, always check the address in the browser. Never perform software updates for wallets via a link that you receive by email. Always go to the wallet website yourself and download the latest version.
> Do not keep too large amounts on exchanges.
> Adjust the wallet usage to the amount you want to keep (large amounts in hardware wallets).
> Create backups and keep them safe. Several backups are the best.
> On a second device try if the wallet can be restored from the backup.
> Choose the wallet stake and backup so that you are still comfortable when the value multiplies.