Ethereum price at the end of 2017 reached new ATH above $1k usd, from there it dropped to $100 USD and I think Ethereum price went up more than $3k usd is a fair price when a coin ever reaches ATH.
For BNB I think the price needs to drop to $100 USD, -90% of ATH and to reach new ATH again when the BTC Halving starts. $1000 usd price will reach BNB, even more, we only need a few years to see that.