Do you think the major is useful?

Yes, I think history major is useful. History records the development and progress of human society. An old Chinese saying goes: History is a mirror, through it that which we could can understand the rise and decline of the nationasl. So majoring in history major is useful.

I agree though it may not earn you a good livelihood.  On the other hand, not knowing history well will cost you greatly.  Great example, Hitler did not learn his history well.  If he had known it well, he would not have followed Napolean's folly into invading Russia during winter!