Now the market capitalization of BNB coming close to ADA and I don't think BNB can be said to have established a strong position in the market.

The growth of cardano is so fast in term of market capitalization that maybe it can replace BNB in just few weeks but maybe BNB will not just doing nothing when ADA has come really close. But if ADA suddenly have price drop then BNB will still stay on its current position.