Coins: 0.05, 0.10, 0.25, 1, 2.5, 5 Bank notes: 10, 25, 50, 100, 250
OK, there seems to be a gap there, but no coin or bank note is worth 2 * 10^X.
https://en.wikipedia.org/wiki/Dutch_guilder
Is there another currency that consistently prefers 2.5 * 10^X to 2 * 10^X?