chore: update copy

src/modules/PublicSale/activities/index.tsx

@@ -90,7 +90,7 @@ Good luck and have fun!
           },
         ],
         desc: 'NakaChain is a low-cost and lightning-fast Bitcoin Layer 2 blockchain designed for DeFi apps, enabling the payment of gas fees in Bitcoin. It’s powered by BVM with these modules: Bitcoin for security, Polygon for data availability, and Optimism for execution.' +
-          '<br/><br/>On the second day of awesomeness, challenge yourself to dominate the market by trading futures on BRC-20 tokens\' prices. The top gainer will be rewarded every 2 hours.' +
+          '<br/><br/>On the second day of awesomeness, challenge yourself to dominate the market by trading futures on BRC-20 tokens\' prices. Every two hours, the top gainer will earn $250 in Bitcoin.\n' +
           '<br/><br/>Total rewards: <span style="color: #FA4E0E">$3,000</span>',
       },
       {