And what prevents the SBD to be fixed currency, but with the price of $10? :) Yes it may sound illogical, but on the other hand, fiat money works on the same principle constantly changing in price relative to each other, and even their equivalent in commodities is constantly changing. Even gold may vary in price, although it is considered a standard. Pump cost, for example every six months is normal. I think more harmful is to force the lowering of prices, which again can jump. Such a scenario definitely rules out the concept of fixed currency.