What's your choice? Ethereum or Binance Chain? Why did you select such cryptocurrency? Will one of them fade into oblivion sometime in the future? Or will they co-exist for many generations? Your input will be greatly appreciated. Thank you 
In 2021 the Binance smart chain began to be widely used. Even most of the new projects use the Binance smart chain. But the Ethereum smart chain is also still at number one. As new projects on the Binance smart chain progress, so does the Ethereum smart chain project coming with great coins.
Both Ethereum and BNB coins will last a long time in my opinion. BNB has the opportunity to continue to increase as more projects join and the transaction value in BSC continues to rise. But ethereum is already known by many developers and makes the ethereum network widely used by many altcoins. It's better to invest in both coins with a portion that we can manage