No, BNB will not become the king of all coins. If Ethereum is hard to surpass bitcoin, how much more BNB? Maybe it will surpass the ETH but not the king of all coins. BNB has a lot of competitors in altcoin market with potential to increase it's value in the future.
I agree with you, the difference in value from the king of altcoins is still far apart, let alone being the king of all coins, indeed at this time BNB is experiencing good development, but if you expect that BNB will be the king of all coins, it will only be a wishful thinking. wishful thinking.