spoiler: They are fractional reserve banking with the btc, that is why they had to create their bullshit BNB coins now. I look forward to the day of mtgox2.0 it is coming.
I'm pretty sure that we'll see Binance bust it's nr 1 spot eventually, but I can't see it become MtGox 2.0 at all unless CZ and his fellow colleagues plan an exit scam when Binance is no longer the money making machine that it is today.
People can say about CZ whatever they want, but he has turned something people initially didn't believe in into a crypto powerhouse with a native exchange token worth billions. CZ is a mastermind who turns everything he touches into gold.