Foresight News reports that the Bitcoin ecosystem wallet UniSat has issued a security alert, clearly stating that the two BRC20 tokens 'unisats' and 'FBmainchain' on the Fractal platform are not officially issued. UniSat emphasizes that all official activities and airdrops will only be announced through official channels, reminding users to remain vigilant about unknown airdrop assets appearing in their wallets to avoid unnecessary risks.