It is no longer news that Binance is launching their own chain on the 23rd of April, 2019. All BNB holders can convert their ERC 20 to Binance Chain and MITH has announce to be the first to migrate to Binance Chain and pumped 60% overnight. Is Binance Chain decentralized or semi-decentrilized considering that they will be in control of their chain network. With the lack of smart contract, are they really pulling any challenge to ETH? Well. If the purpose is for crowdfunding and the possibility of getting listed, BNB might receive a lot of attention. In my own opinion, Binance Team is setting the pace for other exchanges and they are doing really well.
There are over 100 competitor for Ethereum. All of them wants to take over Ethereum place... And no one can make it until now.
I guess BNB can't take over also. Believe or not Ethereum is one of the decentralized network ever. So BNB won't be never. Always CZ can manipulate it. I think Binance is number one of this market but it is not about the network. It is about exchanges.
Still, everything is possible in this market. We will watch and see soon.
I like the way you gave an opinion mate because it is not one sided. For me it is too early to tell if Binance coin or BNB will take over Ethereum, why? Because as you have said there are hundreds or thousands of Altcoin competitors of Ethereum that has failed to take over due to Ethereum's strong community and there are a lot of developers that makes upgrades to the Ethereum platform. Ethereum was already accepted by some country's local exchanges and other merchants as mode of payment just like here in my country.