Many things depend here. People using Binance because the fees here are very low and there is enough liquidity. But nobody can cashout using binance.
Did you just say nobody can cash out with Binance? Binance exchange supports more than 40 local currencies for direct cash out, and they are still expanding to other countries too, direct deposit and withdrawal to your bank account, it's something that I've used not that someone else tell me,
As for the liquidity, Yes Binance has much than coinbase, I guess this is another reason why Binance is well ahead of coinbase