Over time players gain levels, and obtain expensive items more often.
With more NEW players, comes higher gold prices.
As players become MORE EXPERIENCED, they can make tons of gold.
If players GAMBLE, they may turn their gold pile into billions.
When you have less new players, and more experienced players, gold becomes less valuable & alot of the market will be
controlled by those who gamble.
That's why when OSRS went to mobile, and we saw 150,000 people online, and the huge longer lasting spike, gold rose.
Now it's cooled down, gold dropped back down.