Is Yan Shiju's calligraphy worth collecting?

Objectively speaking, Teacher Yan's handwriting is very good. In today's China calligraphy art world, the collection is definitely valuable because it is based on two conditions, one is historical value and the other is artistic value. If these two conditions meet one, they can be collected. To tell the truth, if I have the skill of teacher Yan, it should not be difficult to earn tens of millions. I'm not bragging.