Honestly speaking I haven't realized regrets as of now for I'm new to cryptocurrency and actually my first time joining airdrops and bounties. Speaking of Airdrop, WOM token are Having airdrops at this moment, and this the first airdrop that I participated. 
https://docs.google.com/forms/d/10OlnEzIE6RG6ZNd82JmxEBP-UMJT1eVCwSt_8S8MUDw/viewform?edit_requested=true#new
I actually tried to sign up for the airdrop, but it was kinda too late. WOM tokens already finished their airdrop. https://docs.google.com/forms/d/10OlnEzIE6RG6ZNd82JmxEBP-UMJT1eVCwSt_8S8MUDw/viewform?edit_requested=true#new