OKX has launched a new Bitcoin price guessing game called 'OKX Racer' as part of the growing trend of Telegram mini-apps. The game allows users to guess the price of Bitcoin, earn points, and use them for upgrades. Players can also compete on a leaderboard for bragging rights, complete KYC for future surprises, and participate in 'race day' activities. Users are encouraged to 'Rev up' their engines and 'invite frens' to join.