The Bicentennial quarters you're referring to are indeed quite special. They were minted in 1976 to commemorate the 200th anniversary of the United States, and some of them have specific characteristics that make them rare and valuable to collectors.
However, while some Bicentennial quarters can fetch a premium, it's highly unlikely that any single coin, even one with exceptional rarity, would be valued at $90 million.
It's essential to exercise caution when encountering claims about the value of coins, especially when they seem exaggerated.
The value of a coin is determined by factors like its rarity, condition, demand among collectors, and historical significance.
While some Bicentennial quarters may indeed be worth a substantial amount to collectors, such high valuations as $90 million each are likely exaggerations or misunderstandings.
Always consult reputable numismatic sources or appraisers for accurate information about the value of rare coins.