One common currency

Bahamut81: I'd prefer this system, though it's a little antiquated in MMORPGs. It's main advantage is it's clearness, compared to the proprosed more complex currency system. I think it's more motivating to gain your first silver coin compared to getting your 50th GP, too. Also, it keeps values easier to judge and they probably stay more even (Compare 3 Gold 13 Silver to 4075 GP). I'd prefer ratios which are rather plain, like 1:100:10,000 . Sorry, but I also don't like the fluctuating curreny system, as I despise every kind of speculation.

HABARI: Krons (made of gold) goldins (made of platinium) roondis (made of silver) mips (made of bronze) the relation is 10-10-10-10