Those lost bitcoins cant really be recovered and they will just remain floating on bitcoin world. I dont think that bitcoins price would able to reach millions of dollars which is really impossible to achieve even on the future. Maybe it would possible on 3-5k dollars but not on millions even on $10k. Well who knows since no one could really able to predict the future.
That is eally an ambitious prediction drom a Chinese miner/trader. Though anything can happen but to reach a million is not achieveble in our life time in m opinion. Though its only a speculation but some will definitely buy more bitcoin and hoard LOL