If we believe that everything is connected with Bitcoin price, then when Bitcoin cost $69k, BNB price was $700, which makes it if Bitcoin reaches $100k, then BNB would cost slightly more than $1000. Bitcoin must make x5 to reach that. Honestly, that looks unreal under current market circumstances. By itself, Bitcoin already is an expensive asset. It will be very difficult to get back to previous ATH. And it will be double harder for altcoins to get back to their historical maximum. I think I am rather pessimistic on BNB will cost $1k.
It is natural that the price of Altcoins is always related to the price of Bitcoin, it is still difficult to leave the influence of Bitcoin, the presence of stable coins has shifted Daily Trading and I hope Altcoins including BNB can be independent and not dependent on Bitcoin because marketcap and exchangs support.