"It all started with a simple idea by a man named Mike Caldwell. Create a physical token or "coin" that represents a bitcoin. Perhaps a means of offline storage of bitcoin value, perhaps a symbol to represent a trailblazing new technology, perhaps just an interesting conversation piece. Physical crypto-currencies were born and a great many other individuals took part to establish and showcase their own unique designs. Mr. Elias Ahonen has created an exceptionally thorough, detailed, and complete catalog of physical crypto-currencies (up to the time of printing anyway). First of its kind with detailed photos, mintage numbers, and discussion with or of the individuals behind each coin abound. Also included is a thoughtful foreword explaining the origin physical crypto-coins and their collectible nature. This is a most recommended piece of reference for anyone with an interest in crypto-currencies, particularly those with an interest in their physical manifestation." - Crazypete "As the first book on this subject, I find it filled with plenty of great information on the subject matter. If your are a veteran coin collector or just starting out, this book covers it all. Tons of great pictures and it covers a wide variety of manufacturers & coins. The beginning of the book gives a nice history and introduction on the topic of physical crypto-currency collecting. Each section presents the makers and their coins in an easy to read and understandable style. From A to Z, this book has your coin!! Great job and thanks." - Erik Pfaffenbach
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