/r/Coins is the main reddit forum for coins and coin collecting. It is the place for non-collectors and new collectors to ask questions about coins. However /r/Coins has many members in the U.S., many of whom primarily collect U.S. coins, and the discussions there are often U.S.-centric. /r/WorldCoins was created for people who collect coins from many different countries and who consider U.S. coins to be just a tiny drop in the ocean of coin collecting.