I think 5,000,000,000 USD in the form of Binance coins cannot yet be able to defeat EThereum because EThereum is still far away in the 25,000,000,000 USD marketcap for circulation of its trading power.
So, this Coin Binance has not been able to overtake Ethereum or cannot compete with Ethereum for now because of almost 5x the difference.
I have checked all this information on famous websites such as cryptocompare, coinmarketcap and coingecko.