How does drilling hole in coin affect value?

Drilling a hole in a coin typically diminishes its numismatic value, as it alters the coin's original condition and aesthetics. Collectors often seek coins in their original, unaltered state, and any modifications, including holes, can significantly reduce desirability and market price. However, some may find value in unique or artistic alterations, but this is generally less common. Overall, a drilled coin is usually considered less valuable than its intact counterpart.