Danh sách các trang kiếm bitcoin miễn phí uy tín, đã test ok.
https://www.coinpayu.com/?r=Procdt
https://cryptowin.io/ref/procdt
https://earnbitmoon.club/?ref=19242
https://cointiply.com/r/MmJ97
https://btcbunch.com/?r=187682
https://grab.tc/?ref=77482 https://coinoto.net/?r=536...