Cardano has experienced a pretty good increase after cardano announced the release of their smart contract, many investors are hunting for cardano because they believe the price of cardano will increase. 
Binance is already popular and is ranked third on Coinmarketcap with a fairly large market cap at the moment,
But because of cardano who is currently ranked fourth, and continues to  trying to threaten binance position,  then binance must be careful.
Anything can happen, and Cardano can move Binance down from number three, and because of the cardano hype now I'm sure Cardano can move up to number three.