After starting trade in binance I also noticed that I am earning more on that exchange then others. According to my views the reason is that it has lesser fees of trade and it has a high volume of trade on all the coins which make us convenient to get faster profit.
I agree with you, Binance is the number one largest cryptocurrency exchange in the world, According to coinmarketcap trading volume. I think once you exchanged your bitcoins on binance This low fee and many profits and convenient trading platforms in the business. in order to cash out, you will have to send them back to another standard there will be no currency based platform.