I think it would be nice to have a timer that counts down letting you know how close you are to finishing your networth merit.
As it stands currently you only see that you have achieved 100% of the conditions for earning the merit.
The timer would work similar to the education timer, appearing among your other icons letting you know exactly how long you have left to hold your networth in order to acquire the merit.
This timer would start as soon as your networth is upgraded with the daily tick.
Of course, if your networth dipped below the requirements the icon would disappear and you would have to then wait for the daily tick and have reached the necessary amount required for the timer to start.