Lack of Research - Failing to educate oneself about coin grading, history, and market values can lead to poor purchasing decisions.

Ignoring Coin Condition - Overlooking the importance of a coin's condition or grade can result in collecting coins that are less valuable.

 Cleaning Coins - Cleaning coins can significantly reduce their value. Natural patina and wear are often more desirable than a shiny appearance.

Impulsive Buying - Purchasing coins on impulse without verifying their authenticity or market value can lead to regret and financial loss.

Neglecting Proper Storage - Storing coins improperly can lead to damage from humidity, handling, or environmental factors.

Not Seeking Expert Advice - Avoiding consultation with experienced collectors or professionals can lead to missed learning opportunities.

Failing to Set a Budget - Not setting a clear budget can result in overspending and financial strain, making the hobby less enjoyable.