Grindabuck is a site where you can earn Bitcoin by completing free offers, taking surveys, listening to music, watching videos, viewing ads, winning contests, and much more! Those that are not into completing offers, you can still earn Bitcoin passively by playing videos and leaving them run idly while you do other things! Every new sign-up gets started with $1 free Bitcoin ($10 to cashout). Earning $10 does not take long and it takes 2-3 days at most, best site for micro earnings in my opinion.