Update earn-grc.htm

Make all units in GRC not USD

guides/earn-grc.htm

@@ -146,7 +146,7 @@ <h5 class="text-center mt-5">4) Claiming Your Rewards</h5>
                             <p>Your crunching will accrue rewards (shown as "pending reward" in wallet). This reward is based on a rolling average of your credit on BOINC projects called RAC (recent average credit), which means it will "ramp up" when you start crunching and "ramp down" when you stop. It will take approximately <i>two weeks</i> to reach your maximum average daily reward. There are two ways to claim your rewards: an MRC request or staking a block. </p>
                             <ol>
                               <li>You can make an MRC request at most every two weeks (you must wait two weeks for your first request). The longer you wait between requests, the lower the fee will be. The fee funds development and pays a staker to stake a block for you. To make a request, click the purple hand icon.</li>      
-                              <li>You can stake a block. You will need approximately $60 USD worth of Gridcoin to stake <i>on average</i> once a month. Staking collects your rewards with no fees and you also collect fees from other transactions in the block you stake</li>
+                              <li>You can stake a block. You will need approximately 6,000 GRC to stake <i>on average</i> once a month. Staking collects your rewards with no fees and you also collect fees from other transactions in the block you stake</li>
                             </ol>
                   </div>
 <h5 class="text-center mt-5">5) Bonus Step: Sidestake to Help Gridcoin's Development</h5>