A private VPS rental does not make the server secure by itself. Store the recovery code, wallet information, SSH private key, and application data separately so that one exposed credential does not compromise the entire system. Use only the confirmed USDT-TRC20 address for payment.
After deployment, replace default passwords, prefer SSH keys, close unused ports, and restrict administrative access. Websites and APIs should also use HTTPS, backups, and basic login protection.
For stronger separation, place the public API, database, and monitoring on different services. A VPS provides flexibility; it does not replace security configuration or operational maintenance.