Is Cao's calligraphy collectible?

And Cao's calligraphy are all collectible.

1, Lin Sanzhi is a contemporary sage. His cursive script is very collectible. From the 1970s, each pair of 10~20 yuan to the 1980s, from 2000~5000 yuan in the 1990s to 60000 yuan per pair of 800 yuan in 2008, each pair has been rapidly appreciating at around 300 ~100000 yuan.

2. Cao's calligraphy is worth collecting. Cao China is a member of Calligraphers Association, a pioneer of China painting and calligraphy art, a first-class master of Chinese Painting and Calligraphy Institute, a cultural ambassador of Chinese Painting and Calligraphy Institute, an academician of International Xizhi Painting and Calligraphy Institute, a director of China Calligraphers Association, a senior calligrapher of China Calligraphy Artists' Art Creation Center, and a special senior calligrapher of Hunan Provincial Organs Calligraphers Association Creation Center. Cao's calligraphy is one of the top ten calligraphers with the greatest market appreciation potential. Member of the World China Calligraphy and Painting Masters Association. The most influential international master of painting and calligraphy.