I agree with your opinion BNB is not only capable but also able to compete with other Altcoins such as ETH, XRP. We can see the growth of BNB in the past few years when it was supported by the Binance trading site, which is attractive to investors in the long-term.
It could be soon standing in the top 3, they just created a platform that would help increase the demand of their coins.
In addition, they have the volume and good reputation as an exchange, I would not be surprise they'll keep improve as the market turn more bullish.