1: Rare centime worth nearly 550 million USD discovered in attic

2: 5 more rare centimes worth over 150 million USD each

3: Historic value of rare coins skyrocketing in collectors' market

4: Experts speculate on origins of valuable centimes

5: Investors flocking to acquire rare coin treasures

6: Rare centime auction prices reaching record highs

7: Antique coin enthusiasts driving up demand for numismatic rarities

8: Global fascination with rare coin discoveries on the rise

9: Rare centime values expected to continue climbing in coming years