OKX Weekly Highlights one ️⃣ OKX launches Spark USDC on chain coin earning reward activity two ️⃣ OKXWallet Water Center supports KiteAI Water three ️⃣ Offline of USDC leveraged coin pairs for some currencies four ️⃣ OKXWallet ranks first in comprehensive security rating on the @ CertiK Skynet leaderboard