Not only is Greenland not the largest volcano on Earth, there is no active volcano there, nor any dormant ones under its ice sheet. So, not melting and not a volcano. Nothing's hit the fan since you began sounding the alarm in July. Keep predicting that shit will hit a fan, and sometime in the next half billion years you may be right.
Its a fucking volcano, with enough ice on top of it to constitute a continent. You release that pressure, and you will see how active it becomes.