4 out of 10 Richest Banks in the World are from China, is this the Reason behind the Crypto Ban in China?

Hi,

I was Googling around and I found this video by Alux channel on Youtube. ACBC - the richest bank in the world and China is having assets worth more than 3 Trillions.

And there are three other banks from China who are among the top 10 richest banks in the world.

Given that China has communist govt does that make the banks more power to play around with the money?
It looks like that. Also when you are the richest bank, Bitcoin might be a scary thing, because it can taje away your business. What do you think?