In my opinion, BNB has a possibility to become the king of all coins but it is extremely low because Bitcoin is the base of cryptocurrency so if the market pumps so the BTC is. The market have the big change of price when it comes to bitcoin. BNB is still too young to get the throne BtC i guess just because it pumps a lot in the trends in the market.
Yes, it still takes a long time and development to be able to make BNB the king, maybe the first step is to become the king of altcoins shifting ETH's position, if bnb wants to shift the position of btc it's still too heavy because the market focus will always belong to btc, but all possibilities can what happens to the crypto market, we'll see what surprises Bnb will show us.