Airdrops and Crypto bounties are the best methods people can get free tokens or coins for free. I do not know if they are the best airdrop groups, but I will introduce a few groups. I will leave the choice to you:

https://t.me/bestieairdrop
https://t.me/airdrop_stop
https://t.me/AirDroopy
https://t.me/airdrops_airdrops
https://t.me/bestcryptobounty