As a fintech professional, it's important to highlight your knowledge of the industry by reflecting on what you view to be the greatest challenge in fintech. This question is an excellent opportunity to demonstrate to your interviewer that you have done adequate research and can speak to these issues in an educated manner, especially if you are new to the industry. Highlight one challenge that will be relevant to the position to which you're applying. Common challenges that you might highlight include cybersecurity, the relationship of traditional financial services firms with fintech companies, regulations, and protecting user data.