that is actually one of the drawbacks being an exchange coin. once the exchange suffers a very damaging situation like hacking or inside job, which is very possible to happen again in the future, the value of their coin will suffer. though BNB has insurance funds but we don't know what will happen if they will encounter massive hacking again. remember hackers are aggressive and always finding ways how to penetrate even the high secured system. whereas, ethereum is an open source and still doing their upgrades. numerous projects are based on their network and up until now, many developers are still utilising their platform. i guess eth has many advantages over BNB, and would take years if in case they will take over eth. but for now, i dont see it in the horizon that BNB will beat ETH.
Exactly. BNB has more to lose than Ethereum because it's too tied to Binance. In case the world's most popular crypto exchange fails, you can expect the Binance Chain to fail altogether. That's not the case with Ethereum, thanks to its decentralized and permissioned-less design. I believe that at some point in the future, the BNB chain will be used for security tokens since it's more regulatory compliant than ETH itself. The world's second-largest cryptocurrency by market cap, will be used for other purposes mainly De-Fi and utility tokens. For each person's tastes, will be the Blockchain to use for mainstream digital payments.
In terms of BNB replacing ETH, it's impossible since the latter has years of development and innovation. Many people know more about Ethereum than they do with BNB. Ethereum has a large ecosystem of dApps, and tokens with many developers around the world supporting it. In contrast, BNB is relatively new to the space with very low mainstream adoption. Even if Binance continues to build upon its Binance Chain platform (powering BNB), it'll always be one step behind the original smart contract platform (ETH). People might as well use BNB for trading discounts, while they use ETH for tokens, lending platforms, and blockchain-based gaming. Rather than being a direct competitor to ETH, Binance's BNB token could simply help fill the gaps of ETH, if it becomes extremely clogged in the future. Just my thoughts