Some blockchain projects form a community by giving away their coins to token holders of existing coins. Airdrops also form part of marketing campaigns. If a deposit is the credit of coins from Airdrop, then it must be classified as 'Airdrop'. The airdrop digital currency will be taxed as ordinary income upon receipt date and holding period begins from that day.
The basis of the Airdrop virtual currency and the amount of original income will be the fair market value of the virtual currency on the day it is received.