Payapl Reserve Fund - 1,000,000 JWL
Paypal Jewels & Maturity
There will be a reserved amount of Jewels to be sold via Paypal as this is the most common means of purchase that players are most familiar with. The price of Jewels in USD will be derived from the two markets JWL/USD = JWL/BTC * BTC/USD.
Paypal will be used as a proxy for purchasing Jewels off the market. As the reserve of Jewels for paypal purchases depletes funds received via Paypal will be used to purchase bitcoin used to purchase Jewels from the exchanges thereby adding liquidity to the market.
Is your current goal to maintain a reserve fund of 1,000,000 Jewels?
If so I think a better approach would be to buy Jewels on the exchanges with PayPal funds received and Burn (destroy) them. (Thereby reducing the total JWL supply and thereby having a greater positive impact on the value of the remaining Jewels - supply and demand.) Only if the dollar value of the JWL reserve fund fell very low would the replenishing approach occasionally be appropriate.
A rapidly reducing supply would also create a greater positive market perception because the impact of in-game JWL demand would be visible and have a long term impact.