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The history of coins extends from ancient times to the present. It means that the history of coin is like history of human race. In terms of market economy, it is imperative necessary these days. However, many people think that it is not precious. That’s why the design of coins has not been changed for a long time. No matter how many problems it has, it is neglected simply. The most important problems of current coins are storage and carry it. We solve this problem by combining each coin. Even if their sizes are different, they can't combine each other. Hence, it makes easy to storage and carry;it could be created a new coin's design at once.
Seongnam, South Korea
Korea Polytechnic University
Shiheung-Si, South Korea