don't forget about quarterly burning of BNB by Binance. there will remain only half of initial supply so we can see scarcity of BNB in 3-5 years. also there is growth of use cases for BNB so $5k doesn't look like fantastics.
I don't think anyone will forget that, because from what you said it also doesn't have much effect on BNB if the fans are still very less and what you are seeing now is not because of the burning effect, but because of the effect of the new token developers who have often used the BSC network in their tokens.