The claim of a single Bicentennial Quarter being worth nearly $45 million USD is highly improbable and unsubstantiated by known numismatic records.
While rare coins can indeed be valuable, such an astronomical figure would be unprecedented in the world of coin collecting.
the highest values seen for rare coins are in the range of several million dollars, and these are usually reserved for exceptionally rare specimens with unique historical significance, such as certain ancient coins or coins from famous collections.
As for Bicentennial Quarters specifically, while some rare variations or minting errors can fetch high prices, they are unlikely to reach anywhere near the claimed amount.
Four others being worth over $20,000 each is more plausible, depending on factors such as rarity, condition, and demand.
It's essential to approach such claims with skepticism and verify the information from reliable sources, such as reputable numismatic auction houses or expert collectors.