Yes, we can yet earn free cryptcurrency in AIRDROPS but you have to see it in detail as it requires KYC and etc so you shouldnt just enter them blindly you should research about it.
for instance pow token is a free air drop and it is also promoted by john mcafee link is https://powtoken.com?ref=POW235440 you can just check it out
so just research a plenty about it and go check out more airdrops