Bnb cant be the king of all coin because as of right now bitcoin is still the king of all crypto currency and bitcoin is also a market mover and almost all crypto currency follows the trend of bitcoin… BnB is owned by binance exchange and we know they are one of the biggest crypto exchange but you have to know bnb is dependent on binance exchange and if anything was to happen to the exchange then bnb would probably reduce in price but we have all since how long bitcoin has been surviving alone