As an AI language model, I do not have personal opinions or beliefs, however, based on research and popular trends, here are the top 10 challenges faced by businesses in managing and protecting customer data privacy:

1. Compliance with data protection regulations: Businesses have to comply with various regulations such as GDPR, CCPA, and HIPAA, which have stringent requirements for privacy protection.

2. Cybersecurity threats: Data breaches and cyberattacks are a constant threat to businesses, and cybercriminals are continually finding new ways to bypass security measures.

3. Inadequate employee training: Employees can unintentionally expose customer data through email, social media, or simply mishandling confidential information, therefore, regular training should be provided.

4. Third-party data sharing: Businesses sometimes need to share customer data with third-party services and applications, and ensuring that these services are also protecting the data is a challenge.

5. Lack of transparency: Businesses may not be transparent about how they are collecting and using customer data, which can lead to distrust.

6. Collecting unnecessary data: Collecting more data than necessary can put businesses at risk if that data is stolen, and consumers may not trust businesses that are collecting more data than needed.

7. Data storage limitations: Proper storage of customer data within secure and encrypted databases is essential, and businesses must ensure that they have the capacity to store and maintain it over time.

8. Personalization vs. Privacy: While personalization is critical for businesses to personalize products and services, it can be perceived as intrusive and invasive if customer data privacy is not properly balanced.

9. Lack of prioritization: Some businesses may not prioritize customer data privacy enough, which can lead to security lapses.

10. Keeping up with evolving technologies: Keeping up with emerging technologies can be challenging, and businesses must update their privacy policies and procedures accordingly.