let's see the price of BNB will surpass the ethereum price in the future, I am very sure it can happen because the influence of BNB supply is less than ethereum so that it will make it difficult for people to get BNB, especially since the platform is currently growing very large so there is a high probability of price ethereum defeated by BNB.
I don't think BNB will ever be able to replace Ethereum as the king of altcoins. Ethereum is technically far superior to BNB, although BNB trading volume has surpassed ethereum, but BNB will have a hard time shifting Ethereum's position. Moreover, the Ethereum development team is currently completing their new project, which is Ethereum 2.0. After Ethereum 2.0 was launched, then BNB will it increasingly difficult to replace Ethereum as the second cryptocurrency that has a bright future after Bitcoin.