When considering biometric solutions, prioritize user privacy and data security. Biometric data like fingerprints or facial recognition cannot be changed if it's compromised, so use encryption and secure storage. The reason for this is that any biometric data breach can have big consequences including loss of trust and legal liabilities. Implementing security measures not only protects user data but also GDPR compliance. By investing in security upfront, you protect your reputation and trust with your users.