I've seen quite a few forum topics from several users to track their own JB gains this month. It's interesting to see other players' gains from an outside perspective, but ultimately I can't effectively compare theirs with my own unless I also track it. I did make a spreadsheet of my gains in February for fun, though it got to be a little tedious for me to remember to record the amount I started with each rollover. So I didn't do it this month :(

As far as how or where it could be implemented, on the Event page where all the currency is displayed, each month could be a link to another page that has the player's currency data for that specific month. Several tracker suggestions are below:

Total currency gained every year combined (or total currency from each year written separately)
I think the event page used to display the total event currency you earned since you joined Lioden, but I can't find it this month. Maybe I've gone crazy? Anyway, I thought it was kind of a neat stat, though it didn't factor any months where the player was on hiatus.
> 2019: 1877 Jewel Beetles
> 2020: 0 Jewel Beetles
> 2021: 1459 Jewel Beetles

Total currency gained from current year
I usually save all my currency until the last day of the event, roughly, and I know plenty of other players do too. It's kind of fulfilling to see how much you were able to grind all month. But it sure gets inconvenient to not buy any of the things you need when you need them.

Amount of currency gained within each rollover
It's interesting to see the difference in each day, whether or not a Roasted Lamb might make a big difference, days where you were less busy and could explore more, etc.
> September 1: 34
> September 2: 63
> September 3: 59

Average gained per day (optional, as it's easy enough to input the total gained and divide it by the number of days in the month)

Leaderboards for highest amount gained?
This one I just thought of at random, but I understand if it would be a bad thing to implement! I like the idea of seeing how my grinding compares to others. It would probably be limited to a top 10 like the current existing Leaderboards.
To prevent any players from possibly receiving unwanted attention (if they would end up on the Leaderboard) it would be a toggleable feature, disabled by default. If you would like to have your total currency gained during the month to be made "public", you would have to opt-in. I know there are players who would rather not participate in something like this.

Regarding the last suggestion, it's doesn't exactly encompass the whole post, but I feel it's relevant enough to include within the same post. That said, if it seems separate enough I can make it a separate suggestion or scrap it entirely. Hope to hear some thoughts!

----------------

My other suggestions:
Masterpost here