1) Always use a hardware wallet to prevent my private keys from leaking, you may want to consider getting one.
2) Secure your computer with antivirus software.
3) Never disclose your private key to anyone or claiming airdrop.
I think we can secure our wallet if the private key is we keep and dont open it your wallet if we have no needed to do and dont Share to other your private key so that no one can know your private key and only you can know your wallet.