My only problem with the silver system is that what's to prevent inflation from rising all over again?
I still think inflation can be fixed without overhauling the currency system. Bigger and better gold sinks do help. I've actually noticed this as after the Halloween Gifting, Solstice Caravan, and the big spender's NA, doni prices did dip. At least in the following NAs. So I say we repeat the trend of more gold sinks, not only for getting new pets but also for some functions of the site like renaming, potions that do various things to creatures, and etc.
Also the doni-breeding potion should help lower the price of donis too. The main reason for inflation is the high demand and low supply, so if you increase the supply the prices should drop and such. But yeah. That's just my opinion.