Biometric technology has become a fundamental part of modern life, facilitating tasks like unlocking devices and passing through security checks. It encompasses both physiological traits, such as fingerprints and facial recognition, and behavioral patterns, such as gait analysis and typing rhythms. While these systems enhance security and convenience, they are not without risks. For instance, gait analysis is already in use for security purposes, notably in China, and is being considered for broader applications in the UK. Recent advancements have shown that fingerprints can be extracted from selfies, raising alarms about potential identity theft and unauthorized access. High-profile cases, such as Meta's $1.4 billion settlement for improper facial recognition practices, underscore the importance of privacy. Users are advised to be selective about sharing biometric data, utilize multi-factor authentication, and regularly check app permissions to safeguard their information. As biometric technology continues to evolve, understanding its implications and vulnerabilities is crucial for protecting personal privacy.