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You can buy of course BNB because that alone gives you a great features and backed by binance and the man CZ.
This is the expectation by many but you need to take into account the legal complication they are facing from the regulators and everyone is aware of the fiasco made by FTX, who majority thought was a reputable exchange. Same goes to every centralized exchange who has their dedicated token, if they get into trouble legally or otherwise, it will turn into trash.