Well, as I see it the users with the most VG$ on this site have barely made it past 100K. So if one month gold is 100K VG$ and therefore one month silver is 40K and Bronze 25K, this should not be attainable in a month - or even a year. And gives the rich ones a possibility to blow their VG$. But well, was just a suggestion.
Thinking about it, I came up with another idea: over the site sprinkled are some different leaderboards, like for the prediction league and a badge leaderboard. There could be a general leaderboard. It could for each category offer the choice between overall, last year or last month. The categories could be:
Along these lines. The most important part is having only one leaderboard and switching between categories or time period (month, year, all time) in one central place.
More good stuff!!!
Geez - you're gonna keep me busy for the next 6 months...