Thank you for the interesting answers. 
The earning potential vary significantly and the risks also. How exactly did I imagine this with the "airdrops"?
I don't know that yet. Who knows details?
Airdrop is one of many kind promotion method of the project by distribute their coin. The earning potential vary significantly and the risks also. How exactly did I imagine this with the "airdrops"? I don't know that yet. Who knows details?
I don't know Bitcoin airdrop is ever exist in the past, but right now there's no Bitcoin airdrop AFAIK.