I buy crowns a lot, and this time i wanted to get enough crowns to buy the Wizard's Watchtower, a castle a i wanted. But in decided to do something different. Buy it with GOLD. I realized that the watchtower cost 7,500 crowns and 75,000 gold. So it cost 10 times the amount when you shop with gold. And that applies with every castle. So since 7,500 crowns is equal to $15, then $15 is equal to 75,000 gold. Divide both by 15, and you realize that 1 dollar in real life is equal to 5;000 gold in the game! Not that this would be useful in life, but i just thought it was interesting to compare our currency to theirs!