What if someone has control over BCH? If someone holding more than 30% of the BCH supply would you dare to buy?

No you shouldn't buy, because if someone has a control over any coin, than that can be a rug pull.

To buy a good coin, you should've analysis to see that if the top holder is not holding more than 10% of the supply. So if the owner sold it will not dump more than 15%

I don't know much but I can say that the top 10 holder of BCH is not holding more than 5%

BCH is the money of people! #BCH