I would say no. Max your TH7 including walls. When you do the math and see that all of your upgrades will be done by the time your TH8 upgrade is done, start the upgrade. Then make sure to also have all of your storages full.
At TH8, take the time to learn how to effectively use air attacks (dragons, Dragloon) and hogs. Max out your TH8 the same way you did at 7. Then and only then would I suggest going to TH9.

