The claim that a rare Bicentennial quarter is worth nearly $27 million appears to be a mixture of hyperbole and misinformation.
While some articles mention high values for certain rare coins, the Bicentennial quarter itself, minted in 1976 to commemorate the 200th anniversary of the United States, is not typically valued anywhere near this amount.
Most Bicentennial quarters are common and have a face value of 25 cents.
there are indeed several historical coins that have fetched millions at auction. For example, the 1794 Flowing Hair Silver Dollar and the 1787 Brasher Doubloon have been estimated to be worth over $30 million due to their historical significance, rarity, and the exceptional condition of the specimens
If you're interested in coin collecting, focusing on authenticated rare coins with documented auction sales is advisable.
For instance, while certain Liberty Head Nickels or Edward III Florins are worth substantial sums, the astronomical values often associated with common commemorative coins like the Bicentennial quarter should be viewed with skepticism.