4. **How do digital and blockchain-based sports cards, such as those offered by platforms like Sorare or NBA Top Shot, compare to traditional physical cards in terms of value and collector interest?
3. **In the realm of sports cards for niche sports (like golf, tennis, or wrestling), which cards or sets have gained significant attention from collectors, and why?
What are some challenges collectors might face when attempting to sell or trade cards from non-mainstream sports, and how can these be addressed effectively?
What role do third-party grading services play in the authentication and valuation of sports cards outside of the mainstream sports like football, basketball, and baseball?
What are the environmental impacts of sports card production, and are there sustainable practices or initiatives being adopted by manufacturers to address these concerns?