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That's a funny request! While it may be tough to find a completely "boring" coin, one option could be to look for coins from countries that have relatively simple designs or lack historical significance. For example, you might consider coins from smaller or less-known nations that don't have many unique or interesting features to distinguish them from other world currencies. Alternatively, you could also search for commemorative coins that were produced in large quantities and lack any real collectible value beyond their face value. However, it's always more fun to seek out and appreciate the beauty and history of unique and interesting coin designs, so maybe stick with those instead!