Also, the definition of coin collector is one that we might have some difficulty pinning down. The U.S. Mint's 125 million includes virtually everybody who ever threw a coin in a drawer. By such a liberal definition, there are probably two billion coin collectors in the world. As every reader of World Coin News knows, though, if there were that many world coin collectors, it would be a whole lot easier to sell off our modern duplicates. There are some general factors to consider.
Wealthy countries tend to have more coin collectors than poor countries.
Countries that have long coin-issuing histories with denominations that do not inflate away have more collectors than countries that can't meet that hurdle. Countries that have a body of numismatic literature in their language by local authors also have more coin collectors. Take this information wherever you would like to run with it. We know there is a high level of interest in seeing what other hobbyists think. That is part of the paradox of collecting.