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If BNB could do $1500 then I strongly believe Ethereum will with no hesitation hit that ath of 10000$. As for me, I believe in ETH more than I do in BNB. BNB is just a copy paste of ETH, you can tell from the blockchain and other ways it operates.
Why do you think there must be a parallel range of market valuation, looking at the price right now where Ethereum is trading above $3100 and BNB around $353 we should expect that the market of BNB will rise in due time because the number of projects using them is much higher.