Yes, but it depends on what token you received. Airdrop is a good source of income that allows you to have and exchange to for Bitcoin or etherneum. But on the hand, there are some token that is not worth having meaning to say have no worth or can be exchange or trading because of the current prize because it has been abandon by its developers. Well seems it is only an airdrop or in other words free, there isn't nothing to lose even if we received some useless tokens.