Is this not a ficus microcarpa(ginseng)
It is, but bonsai is not a tree species, it is the art create miniaturized trees, resembling trees in nature.
Which according to every guide online including on the one on this website is a very popular type for bonsai especially for beginners
- www.bonsaiempire.com/tree-species/ficus
Look at the link you supplied and you will see a huge difference.
And why is that not suitable for bonsai
The species is suitable.Your plant was not created using bonsai techniques. It is no longer suitable for bonsai.