According to the IRS, earning income on crypto is considered a taxable event in the US, and cryptocurrencies are generally treated as property(similar to gold or shares in publicly owned companies) for tax purposes. That means that interest paid to you on crypto assets are payments of property, making them subject to reporting through the 1099-Miscellaneous (also known as the 1099-MISC) form.
US taxpayers who have earned more than $600.00 USD of crypto interest and/or received any crypto bonuses or promotions payouts in a given year will receive a 1099-MISC form.