I am not saying that at all. I said "exchange," not "craft." Learn to

ing read. What I mean is that when you exchange money, there's nothing left over because the person you're exchanging it with doesn't give you back what you gave him. It
is safe to assume that you're somehow exchanging the money because it's
money. That's what you do with money. It's different than crafting an item with materials. The ridiculous assumption I am referring to is that the coins are literally made from, therefore retain the mass of, the lower values. It's not like coins in Terraria are named after their values, they're named after what they're made of. Silver, gold, and platinum all have their own masses. 1 cubic centimeter of silver isn't equal to 100 cubic centimeters of copper, gold isn't equal to 100 cubic centimeters of silver, and so on. If you asked me who you're exchanging coins with, I couldn't tell you. Maybe the bunnies. Or every other entity in Terraria that carries coins for whatever reason. Wolves? Penguins? Bats? Why not? Maybe it's the same people who store all of the NPCs' money, since none of them drop any coins upon death.