There are many other reasons why NCLT coins enter circulation anyway.
- A coin collection may be
inherited by someone who does not understand that the coins in the sets are in any way "special", and simply spends them as money.
- A child or other family member in need of some quick cash may "borrow" a coin from a set, again not realising that those coins shouldn't be spent and can't easily be replaced.
- A coin collection may be stolen; the thief knows only that the coins look just like normal money, so they spend them.
- A proof or mint set might be damaged in some kind of natural disaster (fire, flood, etc), such that the coins become near-worthless as collectables. In such a circumstance, being used as spending money may have been their best recompense for their loss.
- Some collectors buy NCLT coins and deliberately take a loss by spending them, merely in the hope that someone receiving the unusual coin in change might notice it and catch the coin collecting bug.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis