Sea level is rising at an unalarming 2-3mm per year. About a foot a century. Believe me, we can adapt to that. Even if you could control the sea level, by the way, due to tectonics, a lot of land is moving at millimeters per year as well. Some landmasses move up, some move down. Change is constant on this planet. Adaptation is the only way.
Sea level rise will accelerate. Either you are being deliberately obtuse, or you are completely uninformed.
It actually may drop around Greenland and Antarctica, as well. The reduced mass of ice causes the water level to drop despite the overall sea level rise. This of course means higher rises elsewhere. Surprisingly, this didn't occur to anyone until just a few years ago.