1: Rare bicentennial quarter sells for nearly $33 million

2: Six more bicentennial quarters valued at over $50 million each

3: Investors flock to collectible coins for high returns

4: Rarity and condition crucial to coin valuation

5: Future potential for appreciation in coin market

6: Experts predict continued growth in coin values

7: Bicentennial quarters offer unique investment opportunity

8: Collectors seek out rare coins for their portfolios

9: Historical significance adds value to bicentennial quarters