To big to fail concept applies to banking system of fractional reserve that is wholly supported by government! In the case of binance, I do not see any government supporting it! CZ seem to have a hang on how to keep binance from falling. It is however dangerous for Cryptocurrency ecosystem that a centralized point of failure is controlling large percentage of Cryptocurrency market share!
Couldn't agree more with you, mate. CZ is the only one backing Binance right now. A major hack or a full government crackdown should put Binance on its feet. What's concerning is the huge dominance Binance has over the crypto market. If it fails, it will bring down the whole crypto/Blockchain space with it. This will lead us back to the events of Mt Gox. where Bitcoin went all the way down the drain in an instant. While crypto will most likely recover, it may take quite some time before it goes back to its former glory. Things would've been worse if crypto/Blockchain tech was centralized. It would put an end to the revolution as we know it.
Nonetheless, we could say that nothing lasts forever. History has shown us that empires have seen their demise with even the most insignificant things. The same can happen with Binance if it faces an undesired situation where there's no point for recovery. What matters is that crypto stays resilient after a big downfall in price. I believe things will carry on as usual after Binance's demise, as a new exchange becomes the "new leader" of the market. Binance or not, crypto will be here to stay for a long, long time. Just my thoughts