   Collectable coins
  Recently, every year, countries started making a yearly special edition version of the 2 Euro coins.For example Belgium made those:Those coins, I'm sure, won't stay in circulation for a long time, because people keep them because they're special.This is all very nice and everything (I collect them too), but I wonder what the purpose of those coins is? Because people keep them, they won't be used in the economy anyway, because any such coin that does will after a while be kept by someone anyway.Why do they make such coins if they know they won't be used for what they were made for?   
  They're made solely to be collected. The Belgian National Bank brings out a dozen of those sets every year. People who have subscribed to a newsletter are informed of the new coins appearing and can order them directly at the National Bank. I doubt they're brought in normal circulation at all.   