Investors should research the legal and tax regulations in their local jurisdiction. Some countries may consider airdropped tokens as taxable income, while others may have different rules. For example, in the United States, the IRS has issued guidance on the tax treatment of virtual currencies. Seek advice from a tax professional who is knowledgeable about cryptocurrency taxation. They can help investors understand how to report airdrop income, any deductions available, and how to comply with local laws. Some countries may also have regulations regarding the legality of participating in certain types of airdrops, which investors need to be aware of.