Chi la mot phan code ma nguoi viet da lam ra. Nguoi choi bit coin se luon thang vi no tu dong tang len chu khong bao gio giam . Nhung nguoc lai nguoi choi se mat toan bo so tien neu nguoi khac biet duoc phan mem dieu khien cua no .Mot ca nhan thi choi duoc. Mot nuoc thi khong nen. Hahahaha