The notion of six rare dimes and an "ancient" Bicentennial Quarter each worth $23 million and still circulating is highly improbable.
While there are indeed rare coins that can fetch high prices among collectors, such valuations for coins in circulation would be unprecedented.
Dimes and Bicentennial Quarters are both commonly found in circulation, and while there may be some rare variants or minting errors that increase their value, valuations in the millions for individual coins, especially those in regular circulation, are extremely rare.
Additionally, the term "ancient" typically refers to coins that are hundreds or thousands of years old, whereas the Bicentennial Quarter, minted in 1975 and 1976, is relatively modern in numismatic terms.
If you believe you have rare coins that may be valuable, it's important to have them appraised by a professional numismatist or coin dealer.
They can provide accurate information about the rarity, condition, and value of your coins based on current market conditions and collector demand.