It's really hard to predict what would happen to bitcoin if ever all of it will be mined already. Although by simply analyzing the possible scenario which is limited to no more supply and market has still high demand for it, surely bitcoin's price will skyrocket. I based my analysis on the fundamental and basic law of supply and demand. Of course, when people still want bitcoin for themselves and there is no left to be mined, the trend will go upward making a positive impact on the community. But that would be so far from now if my estimates are not mistaken. By then, the value of bitcoin could possibly surpass half a million. I guess we won't around by then, but it's still nice to invest in it because we can give it as an inheritance to the future generation of our bloodline.