Free crypto coins are like rocks, and less useful than rocks. Of course you can do various tasks to get free coins. But I don't think it's safe. There is no free pie in the world. Avoid clicking on the wrong website when you are doing tasks and freezing your funds.
That's true, nothing free in the world. So i dont think Airdrop or bounty are free coins, without any work they will never pay to their coins, you have to do something then you will get rewards its their promotional campaign. Of course all arent safe but still i see potential project in the market.